10138621 has 2 divisors, whose sum is σ = 10138622. Its totient is φ = 10138620.

The previous prime is 10138577. The next prime is 10138631. The reversal of 10138621 is 12683101.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8732025 + 1406596 = 2955^2 + 1186^2 .

It is a cyclic number.

It is not a de Polignac number, because 10138621 - 2²³ = 1750013 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 10138592 and 10138601.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10138631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5069310 + 5069311.

It is an arithmetic number, because the mean of its divisors is an integer number (5069311).

Almost surely, 2^10138621 is an apocalyptic number.

It is an amenable number.

10138621 is a deficient number, since it is larger than the sum of its proper divisors (1).

10138621 is an equidigital number, since it uses as much as digits as its factorization.

10138621 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 22.

The square root of 10138621 is about 3184.1201296434. The cubic root of 10138621 is about 216.4344038358.

The spelling of 10138621 in words is "ten million, one hundred thirty-eight thousand, six hundred twenty-one".