1235074372921 has 3 divisors (see below), whose sum is σ = 1235075484261. Its totient is φ = 1235073261582.

The previous prime is 1235074372919. The next prime is 1235074372937. The reversal of 1235074372921 is 1292734705321.

The square root of 1235074372921 is 1111339.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 1235074372921 - 2¹ = 1235074372919 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1235074372621) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 555670 + ... + 1667008.

It is an arithmetic number, because the mean of its divisors is an integer number (411691828087).

Almost surely, 2^{1235074372921} is an apocalyptic number.

1235074372921 is the 1111339-th square number.

1235074372921 is the 555670-th centered octagonal number.

It is an amenable number.

1235074372921 is a deficient number, since it is larger than the sum of its proper divisors (1111340).

1235074372921 is an frugal number, since it uses more digits than its factorization.

1235074372921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2222678 (or 1111339 counting only the distinct ones).

The product of its (nonzero) digits is 635040, while the sum is 46.

The spelling of 1235074372921 in words is "one trillion, two hundred thirty-five billion, seventy-four million, three hundred seventy-two thousand, nine hundred twenty-one".