123410621 has 2 divisors, whose sum is σ = 123410622. Its totient is φ = 123410620.

The previous prime is 123410611. The next prime is 123410657. The reversal of 123410621 is 126014321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 122899396 + 511225 = 11086^2 + 715^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123410621 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 123410593 and 123410602.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123410611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61705310 + 61705311.

It is an arithmetic number, because the mean of its divisors is an integer number (61705311).

Almost surely, 2^123410621 is an apocalyptic number.

It is an amenable number.

123410621 is a deficient number, since it is larger than the sum of its proper divisors (1).

123410621 is an equidigital number, since it uses as much as digits as its factorization.

123410621 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 20.

The square root of 123410621 is about 11109.0333062783. The cubic root of 123410621 is about 497.8717822307.

Adding to 123410621 its reverse (126014321), we get a palindrome (249424942).

The spelling of 123410621 in words is "one hundred twenty-three million, four hundred ten thousand, six hundred twenty-one".