40042237 has 4 divisors (see below), whose sum is σ = 40113180. Its totient is φ = 39971296.

The previous prime is 40042231. The next prime is 40042273. The reversal of 40042237 is 73224004.

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 2232036 + 37810201 = 1494^2 + 6149^2 .

It is a cyclic number.

It is not a de Polignac number, because 40042237 - 2³ = 40042229 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40042231) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34618 + ... + 35755.

It is an arithmetic number, because the mean of its divisors is an integer number (10028295).

Almost surely, 2^40042237 is an apocalyptic number.

It is an amenable number.

40042237 is a deficient number, since it is larger than the sum of its proper divisors (70943).

40042237 is an equidigital number, since it uses as much as digits as its factorization.

40042237 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70942.

The product of its (nonzero) digits is 1344, while the sum is 22.

The square root of 40042237 is about 6327.8935673730. The cubic root of 40042237 is about 342.1155207484.

It can be divided in two parts, 4004 and 2237, that added together give a square (6241 = 79²).

The spelling of 40042237 in words is "forty million, forty-two thousand, two hundred thirty-seven".