42637954 has 4 divisors (see below), whose sum is σ = 63956934. Its totient is φ = 21318976.

The previous prime is 42637937. The next prime is 42637997. The reversal of 42637954 is 45973624.

It is a happy number.

42637954 is nontrivially palindromic in base 16.

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

It can be written as a sum of positive squares in only one way, i.e., 42185025 + 452929 = 6495^2 + 673^2 .

It is a super-2 number, since 2×42637954² = 3635990242612232, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10659487 + ... + 10659490.

Almost surely, 2^42637954 is an apocalyptic number.

42637954 is a deficient number, since it is larger than the sum of its proper divisors (21318980).

42637954 is a wasteful number, since it uses less digits than its factorization.

42637954 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21318979.

The product of its digits is 181440, while the sum is 40.

The square root of 42637954 is about 6529.7744218311. The cubic root of 42637954 is about 349.3537844779.

The spelling of 42637954 in words is "forty-two million, six hundred thirty-seven thousand, nine hundred fifty-four".