21024097 has 2 divisors, whose sum is σ = 21024098. Its totient is φ = 21024096.

The previous prime is 21024083. The next prime is 21024137. The reversal of 21024097 is 79042012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14868736 + 6155361 = 3856^2 + 2481^2 .

It is a cyclic number.

It is not a de Polignac number, because 21024097 - 2⁷ = 21023969 is a prime.

It is not a weakly prime, because it can be changed into another prime (21024067) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10512048 + 10512049.

It is an arithmetic number, because the mean of its divisors is an integer number (10512049).

Almost surely, 2^21024097 is an apocalyptic number.

It is an amenable number.

21024097 is a deficient number, since it is larger than the sum of its proper divisors (1).

21024097 is an equidigital number, since it uses as much as digits as its factorization.

21024097 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1008, while the sum is 25.

The square root of 21024097 is about 4585.2041394032. The cubic root of 21024097 is about 275.9979039608.

The spelling of 21024097 in words is "twenty-one million, twenty-four thousand, ninety-seven".