40001375 has 8 divisors (see below), whose sum is σ = 49921872. Its totient is φ = 32001000.

The previous prime is 40001359. The next prime is 40001387. The reversal of 40001375 is 57310004.

It is a happy number.

It is not a de Polignac number, because 40001375 - 2⁴ = 40001359 is a prime.

It is a super-2 number, since 2×40001375² = 3200220003781250, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 159881 + ... + 160130.

It is an arithmetic number, because the mean of its divisors is an integer number (6240234).

Almost surely, 2^40001375 is an apocalyptic number.

40001375 is a deficient number, since it is larger than the sum of its proper divisors (9920497).

40001375 is an equidigital number, since it uses as much as digits as its factorization.

40001375 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 320026 (or 320016 counting only the distinct ones).

The product of its (nonzero) digits is 420, while the sum is 20.

The square root of 40001375 is about 6324.6640226972. The cubic root of 40001375 is about 341.9991079853. Note that the first 3 decimals are identical.

Adding to 40001375 its reverse (57310004), we get a palindrome (97311379).

The spelling of 40001375 in words is "forty million, one thousand, three hundred seventy-five".