102440135 has 24 divisors (see below), whose sum is σ = 143557920. Its totient is φ = 69969984.

The previous prime is 102440131. The next prime is 102440171. The reversal of 102440135 is 531044201.

It is not a de Polignac number, because 102440135 - 2² = 102440131 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102440131) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 77006 + ... + 78324.

It is an arithmetic number, because the mean of its divisors is an integer number (5981580).

Almost surely, 2^102440135 is an apocalyptic number.

102440135 is a deficient number, since it is larger than the sum of its proper divisors (41117785).

102440135 is a wasteful number, since it uses less digits than its factorization.

102440135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1655 (or 1648 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 102440135 is about 10121.2714122288. The cubic root of 102440135 is about 467.9039527615.

Adding to 102440135 its reverse (531044201), we get a palindrome (633484336).

The spelling of 102440135 in words is "one hundred two million, four hundred forty thousand, one hundred thirty-five".