2025102609721 has 3 divisors (see below), whose sum is σ = 2025104032783. Its totient is φ = 2025101186660.

The previous prime is 2025102609667. The next prime is 2025102609797. The reversal of 2025102609721 is 1279062015202.

The square root of 2025102609721 is 1423061.

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 can be written as a sum of positive squares in only one way, i.e., 1790749799721 + 234352810000 = 1338189^2 + 484100^2 .

It is not a de Polignac number, because 2025102609721 - 2³³ = 2016512675129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2025102603721) 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, 711531 + ... + 2134591.

Almost surely, 2^{2025102609721} is an apocalyptic number.

2025102609721 is the 1423061-st square number.

2025102609721 is the 711531-st centered octagonal number.

It is an amenable number.

2025102609721 is a deficient number, since it is larger than the sum of its proper divisors (1423062).

2025102609721 is an frugal number, since it uses more digits than its factorization.

2025102609721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2846122 (or 1423061 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 37.

The spelling of 2025102609721 in words is "two trillion, twenty-five billion, one hundred two million, six hundred nine thousand, seven hundred twenty-one".