10420665 has 16 divisors (see below), whose sum is σ = 16714176. Its totient is φ = 5544000.

The previous prime is 10420637. The next prime is 10420687. The reversal of 10420665 is 56602401.

10420665 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 10420665 - 2⁷ = 10420537 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9390 + ... + 10440.

It is an arithmetic number, because the mean of its divisors is an integer number (1044636).

Almost surely, 2^10420665 is an apocalyptic number.

10420665 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

10420665 is a deficient number, since it is larger than the sum of its proper divisors (6293511).

10420665 is a wasteful number, since it uses less digits than its factorization.

10420665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1720.

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 10420665 is about 3228.1054815480. The cubic root of 10420665 is about 218.4230555368.

The spelling of 10420665 in words is "ten million, four hundred twenty thousand, six hundred sixty-five".