10621861 has 2 divisors, whose sum is σ = 10621862. Its totient is φ = 10621860.

The previous prime is 10621843. The next prime is 10621879. The reversal of 10621861 is 16812601.

It is a balanced prime because it is at equal distance from previous prime (10621843) and next prime (10621879).

It can be written as a sum of positive squares in only one way, i.e., 5377761 + 5244100 = 2319^2 + 2290^2 .

It is a cyclic number.

It is not a de Polignac number, because 10621861 - 2¹⁵ = 10589093 is a prime.

It is a super-2 number, since 2×10621861² = 225647862206642, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10622861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5310930 + 5310931.

It is an arithmetic number, because the mean of its divisors is an integer number (5310931).

Almost surely, 2^10621861 is an apocalyptic number.

It is an amenable number.

10621861 is a deficient number, since it is larger than the sum of its proper divisors (1).

10621861 is an equidigital number, since it uses as much as digits as its factorization.

10621861 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 25.

The square root of 10621861 is about 3259.1196664130. The cubic root of 10621861 is about 219.8198318311.

The spelling of 10621861 in words is "ten million, six hundred twenty-one thousand, eight hundred sixty-one".