21060597 has 4 divisors (see below), whose sum is σ = 28080800. Its totient is φ = 14040396.

The previous prime is 21060553. The next prime is 21060619. The reversal of 21060597 is 79506012.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 21060597 - 2⁷ = 21060469 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21060097) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3510097 + ... + 3510102.

It is an arithmetic number, because the mean of its divisors is an integer number (7020200).

Almost surely, 2^21060597 is an apocalyptic number.

It is an amenable number.

21060597 is a deficient number, since it is larger than the sum of its proper divisors (7020203).

21060597 is an equidigital number, since it uses as much as digits as its factorization.

21060597 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7020202.

The product of its (nonzero) digits is 3780, while the sum is 30.

The square root of 21060597 is about 4589.1826069574. The cubic root of 21060597 is about 276.1575318919.

The spelling of 21060597 in words is "twenty-one million, sixty thousand, five hundred ninety-seven".