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102440141 = 448122861
BaseRepresentation
bin1100001101100…
…01110011001101
321010202111110022
412012301303031
5202211041031
614055351525
72352504206
oct606616315
9233674408
10102440141
1152908881
122a3825a5
13182b938b
14d8685ad
158ed797b
hex61b1ccd

102440141 has 4 divisors (see below), whose sum is σ = 102467484. Its totient is φ = 102412800.

The previous prime is 102440131. The next prime is 102440171. The reversal of 102440141 is 141044201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 141044201 = 197423379.

It can be written as a sum of positive squares in 2 ways, for example, as 89226916 + 13213225 = 9446^2 + 3635^2 .

It is a cyclic number.

It is not a de Polignac number, because 102440141 - 222 = 98245837 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102440101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6950 + ... + 15911.

It is an arithmetic number, because the mean of its divisors is an integer number (25616871).

Almost surely, 2102440141 is an apocalyptic number.

It is an amenable number.

102440141 is a deficient number, since it is larger than the sum of its proper divisors (27343).

102440141 is an equidigital number, since it uses as much as digits as its factorization.

102440141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27342.

The product of its (nonzero) digits is 128, while the sum is 17.

The square root of 102440141 is about 10121.2717086342. The cubic root of 102440141 is about 467.9039618966.

Adding to 102440141 its reverse (141044201), we get a palindrome (243484342).

The spelling of 102440141 in words is "one hundred two million, four hundred forty thousand, one hundred forty-one".

Divisors: 1 4481 22861 102440141