40251442 has 24 divisors (see below), whose sum is σ = 76621680. Its totient is φ = 15681960.

The previous prime is 40251437. The next prime is 40251451. The reversal of 40251442 is 24415204.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17592 + ... + 19747.

It is an arithmetic number, because the mean of its divisors is an integer number (3192570).

Almost surely, 2^40251442 is an apocalyptic number.

40251442 is a deficient number, since it is larger than the sum of its proper divisors (36370238).

40251442 is a wasteful number, since it uses less digits than its factorization.

40251442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37366 (or 37359 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 22.

The square root of 40251442 is about 6344.4024147275. The cubic root of 40251442 is about 342.7102926501.

Adding to 40251442 its reverse (24415204), we get a palindrome (64666646).

The spelling of 40251442 in words is "forty million, two hundred fifty-one thousand, four hundred forty-two".