40102105 has 8 divisors (see below), whose sum is σ = 48159432. Its totient is φ = 32057088.

The previous prime is 40102033. The next prime is 40102109. The reversal of 40102105 is 50120104.

It can be written as a sum of positive squares in 4 ways, for example, as 2782224 + 37319881 = 1668^2 + 6109^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 40102105 - 2¹¹ = 40100057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40102109) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7249 + ... + 11521.

It is an arithmetic number, because the mean of its divisors is an integer number (6019929).

Almost surely, 2^40102105 is an apocalyptic number.

It is an amenable number.

40102105 is a deficient number, since it is larger than the sum of its proper divisors (8057327).

40102105 is a wasteful number, since it uses less digits than its factorization.

40102105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6155.

The product of its (nonzero) digits is 40, while the sum is 13.

The square root of 40102105 is about 6332.6222846464. The cubic root of 40102105 is about 342.2859372421.

Adding to 40102105 its reverse (50120104), we get a palindrome (90222209).

The spelling of 40102105 in words is "forty million, one hundred two thousand, one hundred five".