10621399 has 8 divisors (see below), whose sum is σ = 11232000. Its totient is φ = 10015992.

The previous prime is 10621397. The next prime is 10621411. The reversal of 10621399 is 99312601.

10621399 = 1328² + 1329² + ... + 1333².

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

It is a cyclic number.

It is not a de Polignac number, because 10621399 - 2¹ = 10621397 is a prime.

It is a super-2 number, since 2×10621399² = 225628233434402, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 10621399.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10621397) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3372 + ... + 5710.

It is an arithmetic number, because the mean of its divisors is an integer number (1404000).

Almost surely, 2^10621399 is an apocalyptic number.

10621399 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

10621399 is a deficient number, since it is larger than the sum of its proper divisors (610601).

10621399 is a wasteful number, since it uses less digits than its factorization.

10621399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2597.

The product of its (nonzero) digits is 2916, while the sum is 31.

The square root of 10621399 is about 3259.0487876066. The cubic root of 10621399 is about 219.8166447488.

The spelling of 10621399 in words is "ten million, six hundred twenty-one thousand, three hundred ninety-nine".