10721430 has 32 divisors (see below), whose sum is σ = 28591200. Its totient is φ = 2858976.

The previous prime is 10721419. The next prime is 10721461. The reversal of 10721430 is 3412701.

It is a super-2 number, since 2×10721430² = 229898122489800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19585 + ... + 20124.

It is an arithmetic number, because the mean of its divisors is an integer number (893475).

Almost surely, 2^10721430 is an apocalyptic number.

10721430 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

10721430 is an abundant number, since it is smaller than the sum of its proper divisors (17869770).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

10721430 is a wasteful number, since it uses less digits than its factorization.

10721430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39725 (or 39719 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 18.

The square root of 10721430 is about 3274.3594793486. The cubic root of 10721430 is about 220.5045581917.

The spelling of 10721430 in words is "ten million, seven hundred twenty-one thousand, four hundred thirty".