10621651 has 4 divisors (see below), whose sum is σ = 11246472. Its totient is φ = 9996832.

The previous prime is 10621643. The next prime is 10621657. The reversal of 10621651 is 15612601.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 15612601 = 47 ⋅332183.

It is a cyclic number.

It is not a de Polignac number, because 10621651 - 2³ = 10621643 is a prime.

It is a super-2 number, since 2×10621651² = 225638939931602, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10621657) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 312385 + ... + 312418.

It is an arithmetic number, because the mean of its divisors is an integer number (2811618).

Almost surely, 2^10621651 is an apocalyptic number.

10621651 is a deficient number, since it is larger than the sum of its proper divisors (624821).

10621651 is an equidigital number, since it uses as much as digits as its factorization.

10621651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 624820.

The product of its (nonzero) digits is 360, while the sum is 22.

The square root of 10621651 is about 3259.0874489648. The cubic root of 10621651 is about 219.8183831688.

The spelling of 10621651 in words is "ten million, six hundred twenty-one thousand, six hundred fifty-one".