10501621 has 4 divisors (see below), whose sum is σ = 11309452. Its totient is φ = 9693792.

The previous prime is 10501613. The next prime is 10501643. The reversal of 10501621 is 12610501.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3663396 + 6838225 = 1914^2 + 2615^2 .

It is a cyclic number.

It is not a de Polignac number, because 10501621 - 2³ = 10501613 is a prime.

It is a super-2 number, since 2×10501621² = 220568087255282, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10501595 and 10501604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10501651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 403896 + ... + 403921.

It is an arithmetic number, because the mean of its divisors is an integer number (2827363).

Almost surely, 2^10501621 is an apocalyptic number.

It is an amenable number.

10501621 is a deficient number, since it is larger than the sum of its proper divisors (807831).

10501621 is an equidigital number, since it uses as much as digits as its factorization.

10501621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 807830.

The product of its (nonzero) digits is 60, while the sum is 16.

The square root of 10501621 is about 3240.6204652813. The cubic root of 10501621 is about 218.9872249868.

The spelling of 10501621 in words is "ten million, five hundred one thousand, six hundred twenty-one".