40042375 has 8 divisors (see below), whose sum is σ = 49973040. Its totient is φ = 32033800.

The previous prime is 40042369. The next prime is 40042381. The reversal of 40042375 is 57324004.

It is an interprime number because it is at equal distance from previous prime (40042369) and next prime (40042381).

It is a de Polignac number, because none of the positive numbers 2^k-40042375 is a prime.

It is a hoax number, since the sum of its digits (25) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (25).

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, 160045 + ... + 160294.

It is an arithmetic number, because the mean of its divisors is an integer number (6246630).

Almost surely, 2^40042375 is an apocalyptic number.

40042375 is a deficient number, since it is larger than the sum of its proper divisors (9930665).

40042375 is an equidigital number, since it uses as much as digits as its factorization.

40042375 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 320354 (or 320344 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 25.

The square root of 40042375 is about 6327.9044714660. The cubic root of 40042375 is about 342.1159137658.

Adding to 40042375 its reverse (57324004), we get a palindrome (97366379).

The spelling of 40042375 in words is "forty million, forty-two thousand, three hundred seventy-five".