10621001 has 2 divisors, whose sum is σ = 10621002. Its totient is φ = 10621000.

The previous prime is 10620991. The next prime is 10621007. The reversal of 10621001 is 10012601.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7812025 + 2808976 = 2795^2 + 1676^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10621001 is a prime.

It is a super-2 number, since 2×10621001² = 225611324484002, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (10621007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5310500 + 5310501.

It is an arithmetic number, because the mean of its divisors is an integer number (5310501).

Almost surely, 2^10621001 is an apocalyptic number.

It is an amenable number.

10621001 is a deficient number, since it is larger than the sum of its proper divisors (1).

10621001 is an equidigital number, since it uses as much as digits as its factorization.

10621001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12, while the sum is 11.

The square root of 10621001 is about 3258.9877262733. The cubic root of 10621001 is about 219.8138990930.

Adding to 10621001 its reverse (10012601), we get a palindrome (20633602).

Subtracting from 10621001 its reverse (10012601), we obtain a square (608400 = 780²).

The spelling of 10621001 in words is "ten million, six hundred twenty-one thousand, one".