123570507421 has 8 divisors (see below), whose sum is σ = 125272178424. Its totient is φ = 121869077760.

The previous prime is 123570507413. The next prime is 123570507547. The reversal of 123570507421 is 124705075321.

It can be written as a sum of positive squares in 4 ways, for example, as 50889043396 + 72681464025 = 225586^2 + 269595^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 123570507421 - 2³ = 123570507413 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123570501421) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1131651 + ... + 1236031.

It is an arithmetic number, because the mean of its divisors is an integer number (15659022303).

Almost surely, 2^123570507421 is an apocalyptic number.

It is an amenable number.

123570507421 is a deficient number, since it is larger than the sum of its proper divisors (1701671003).

123570507421 is a wasteful number, since it uses less digits than its factorization.

123570507421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120671.

The product of its (nonzero) digits is 58800, while the sum is 37.

The spelling of 123570507421 in words is "one hundred twenty-three billion, five hundred seventy million, five hundred seven thousand, four hundred twenty-one".