10407921 has 8 divisors (see below), whose sum is σ = 13896480. Its totient is φ = 6928992.

The previous prime is 10407913. The next prime is 10407923. The reversal of 10407921 is 12970401.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 10407921 - 2³ = 10407913 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 10407891 and 10407900.

It is not an unprimeable number, because it can be changed into a prime (10407923) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 685 + ... + 4613.

It is an arithmetic number, because the mean of its divisors is an integer number (1737060).

Almost surely, 2^10407921 is an apocalyptic number.

It is an amenable number.

10407921 is a deficient number, since it is larger than the sum of its proper divisors (3488559).

10407921 is an equidigital number, since it uses as much as digits as its factorization.

10407921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4815.

The product of its (nonzero) digits is 504, while the sum is 24.

The square root of 10407921 is about 3226.1309644836. The cubic root of 10407921 is about 218.3339787225. Note that the first 3 decimals are identical.

The spelling of 10407921 in words is "ten million, four hundred seven thousand, nine hundred twenty-one".