40642495 has 16 divisors (see below), whose sum is σ = 53887680. Its totient is φ = 29269504.

The previous prime is 40642489. The next prime is 40642499. The reversal of 40642495 is 59424604.

It is a cyclic number.

It is not a de Polignac number, because 40642495 - 2⁹ = 40641983 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 40642495.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40642499) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8440 + ... + 12349.

It is an arithmetic number, because the mean of its divisors is an integer number (3367980).

Almost surely, 2^40642495 is an apocalyptic number.

40642495 is a deficient number, since it is larger than the sum of its proper divisors (13245185).

40642495 is a wasteful number, since it uses less digits than its factorization.

40642495 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20834.

The product of its (nonzero) digits is 34560, while the sum is 34.

The square root of 40642495 is about 6375.1466649796. The cubic root of 40642495 is about 343.8165570297.

The spelling of 40642495 in words is "forty million, six hundred forty-two thousand, four hundred ninety-five".