10021239 has 10 divisors (see below), whose sum is σ = 14970120. Its totient is φ = 6680772.

The previous prime is 10021237. The next prime is 10021241. The reversal of 10021239 is 93212001.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (10021237) and next prime (10021241).

It is not a de Polignac number, because 10021239 - 2¹ = 10021237 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10021237) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 61779 + ... + 61940.

It is an arithmetic number, because the mean of its divisors is an integer number (1497012).

Almost surely, 2^10021239 is an apocalyptic number.

10021239 is a deficient number, since it is larger than the sum of its proper divisors (4948881).

10021239 is an equidigital number, since it uses as much as digits as its factorization.

10021239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123731 (or 123722 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

The square root of 10021239 is about 3165.6340597106. The cubic root of 10021239 is about 215.5958879411.

The spelling of 10021239 in words is "ten million, twenty-one thousand, two hundred thirty-nine".