10721406 has 16 divisors (see below), whose sum is σ = 21715200. Its totient is φ = 3528408.

The previous prime is 10721401. The next prime is 10721413. The reversal of 10721406 is 60412701.

10721406 = T₈₆ + T₈₇ + ... + T₄₀₁.

It is a super-2 number, since 2×10721406² = 229897093233672, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10721401) 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 7 ways as a sum of consecutive naturals, for example, 10836 + ... + 11783.

It is an arithmetic number, because the mean of its divisors is an integer number (1357200).

Almost surely, 2^10721406 is an apocalyptic number.

10721406 is an abundant number, since it is smaller than the sum of its proper divisors (10993794).

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

10721406 is a wasteful number, since it uses less digits than its factorization.

10721406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22703.

The product of its (nonzero) digits is 336, while the sum is 21.

The square root of 10721406 is about 3274.3558145076. The cubic root of 10721406 is about 220.5043936579.

The spelling of 10721406 in words is "ten million, seven hundred twenty-one thousand, four hundred six".