40025542 has 4 divisors (see below), whose sum is σ = 60038316. Its totient is φ = 20012770.

The previous prime is 40025519. The next prime is 40025551. The reversal of 40025542 is 24552004.

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

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10006384 + ... + 10006387.

It is an arithmetic number, because the mean of its divisors is an integer number (15009579).

Almost surely, 2^40025542 is an apocalyptic number.

40025542 is a deficient number, since it is larger than the sum of its proper divisors (20012774).

40025542 is a wasteful number, since it uses less digits than its factorization.

40025542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20012773.

The product of its (nonzero) digits is 1600, while the sum is 22.

The square root of 40025542 is about 6326.5742704879. The cubic root of 40025542 is about 342.0679675227.

Adding to 40025542 its reverse (24552004), we get a palindrome (64577546).

The spelling of 40025542 in words is "forty million, twenty-five thousand, five hundred forty-two".