42540802 has 4 divisors (see below), whose sum is σ = 63811206. Its totient is φ = 21270400.

The previous prime is 42540793. The next prime is 42540833. The reversal of 42540802 is 20804524.

It is a happy number.

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., 26532801 + 16008001 = 5151^2 + 4001^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10635199 + ... + 10635202.

Almost surely, 2^42540802 is an apocalyptic number.

42540802 is a deficient number, since it is larger than the sum of its proper divisors (21270404).

42540802 is a wasteful number, since it uses less digits than its factorization.

42540802 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21270403.

The product of its (nonzero) digits is 2560, while the sum is 25.

The square root of 42540802 is about 6522.3310250247. The cubic root of 42540802 is about 349.0882446127.

The spelling of 42540802 in words is "forty-two million, five hundred forty thousand, eight hundred two".