10721439 has 12 divisors (see below), whose sum is σ = 15516072. Its totient is φ = 7134000.

The previous prime is 10721419. The next prime is 10721461. The reversal of 10721439 is 93412701.

It is not a de Polignac number, because 10721439 - 2²³ = 2332831 is a prime.

It is a super-2 number, since 2×10721439² = 229898508461442, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10721419) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6664 + ... + 8114.

It is an arithmetic number, because the mean of its divisors is an integer number (1293006).

Almost surely, 2^10721439 is an apocalyptic number.

10721439 is a deficient number, since it is larger than the sum of its proper divisors (4794633).

10721439 is a wasteful number, since it uses less digits than its factorization.

10721439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2278 (or 2275 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 27.

The square root of 10721439 is about 3274.3608536629. The cubic root of 10721439 is about 220.5046198918.

The spelling of 10721439 in words is "ten million, seven hundred twenty-one thousand, four hundred thirty-nine".