40072465 has 4 divisors (see below), whose sum is σ = 48086964. Its totient is φ = 32057968.

The previous prime is 40072453. The next prime is 40072489. The reversal of 40072465 is 56427004.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6906384 + 33166081 = 2628^2 + 5759^2 .

It is a cyclic number.

It is not a de Polignac number, because 40072465 - 2⁷ = 40072337 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4007242 + ... + 4007251.

It is an arithmetic number, because the mean of its divisors is an integer number (12021741).

Almost surely, 2^40072465 is an apocalyptic number.

It is an amenable number.

40072465 is a deficient number, since it is larger than the sum of its proper divisors (8014499).

40072465 is an equidigital number, since it uses as much as digits as its factorization.

40072465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8014498.

The product of its (nonzero) digits is 6720, while the sum is 28.

The square root of 40072465 is about 6330.2815893134. The cubic root of 40072465 is about 342.2015870920.

Adding to 40072465 its reverse (56427004), we get a palindrome (96499469).

The spelling of 40072465 in words is "forty million, seventy-two thousand, four hundred sixty-five".