42621403 has 12 divisors (see below), whose sum is σ = 47157544. Its totient is φ = 38491200.

The previous prime is 42621391. The next prime is 42621407. The reversal of 42621403 is 30412624.

It is a happy number.

It is not a de Polignac number, because 42621403 - 2⁹ = 42620891 is a prime.

It is a hoax number, since the sum of its digits (22) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42621407) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18643 + ... + 20803.

Almost surely, 2^42621403 is an apocalyptic number.

42621403 is a deficient number, since it is larger than the sum of its proper divisors (4536141).

42621403 is a wasteful number, since it uses less digits than its factorization.

42621403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2346 (or 2335 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 42621403 is about 6528.5069502912. The cubic root of 42621403 is about 349.3085751259.

It can be divided in two parts, 4262 and 1403, that added together give a palindrome (5665).

The spelling of 42621403 in words is "forty-two million, six hundred twenty-one thousand, four hundred three".