10400621 has 16 divisors (see below), whose sum is σ = 13039488. Its totient is φ = 8059200.

The previous prime is 10400603. The next prime is 10400639. The reversal of 10400621 is 12600401.

It is an interprime number because it is at equal distance from previous prime (10400603) and next prime (10400639).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10400621 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 10400596 and 10400605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10400641) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22331 + ... + 22791.

It is an arithmetic number, because the mean of its divisors is an integer number (814968).

Almost surely, 2^10400621 is an apocalyptic number.

10400621 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

10400621 is a deficient number, since it is larger than the sum of its proper divisors (2638867).

10400621 is a wasteful number, since it uses less digits than its factorization.

10400621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 772.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 10400621 is about 3224.9993798449. Note that the first 3 decimals coincide. The cubic root of 10400621 is about 218.2829211090.

The spelling of 10400621 in words is "ten million, four hundred thousand, six hundred twenty-one".