10721970 has 160 divisors (see below), whose sum is σ = 34569216. Its totient is φ = 2332800.

The previous prime is 10721911. The next prime is 10721981. The reversal of 10721970 is 7912701.

10721970 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×10721970² = 229921281361800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 175740 + ... + 175800.

Almost surely, 2^10721970 is an apocalyptic number.

10721970 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 10721970, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17284608).

10721970 is an abundant number, since it is smaller than the sum of its proper divisors (23847246).

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

10721970 is a wasteful number, since it uses less digits than its factorization.

10721970 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118 (or 109 counting only the distinct ones).

The product of its (nonzero) digits is 882, while the sum is 27.

The square root of 10721970 is about 3274.4419371856. The cubic root of 10721970 is about 220.5082601376.

The spelling of 10721970 in words is "ten million, seven hundred twenty-one thousand, nine hundred seventy".