21042598 has 16 divisors (see below), whose sum is σ = 32316480. Its totient is φ = 10273536.

The previous prime is 21042577. The next prime is 21042601. The reversal of 21042598 is 89524012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14640 + ... + 16012.

It is an arithmetic number, because the mean of its divisors is an integer number (2019780).

Almost surely, 2^21042598 is an apocalyptic number.

21042598 is a deficient number, since it is larger than the sum of its proper divisors (11273882).

21042598 is a wasteful number, since it uses less digits than its factorization.

21042598 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1551.

The product of its (nonzero) digits is 5760, while the sum is 31.

The square root of 21042598 is about 4587.2211631880. The cubic root of 21042598 is about 276.0788387114.

The spelling of 21042598 in words is "twenty-one million, forty-two thousand, five hundred ninety-eight".