2125241661 has 8 divisors (see below), whose sum is σ = 2838037824. Its totient is φ = 1414636640.

The previous prime is 2125241641. The next prime is 2125241663. The reversal of 2125241661 is 1661425212.

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 2125241661 - 2⁹ = 2125241149 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2125241663) 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, 545520 + ... + 549401.

It is an arithmetic number, because the mean of its divisors is an integer number (354754728).

Almost surely, 2^2125241661 is an apocalyptic number.

It is an amenable number.

2125241661 is a deficient number, since it is larger than the sum of its proper divisors (712796163).

2125241661 is a wasteful number, since it uses less digits than its factorization.

2125241661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1095571.

The product of its digits is 5760, while the sum is 30.

The square root of 2125241661 is about 46100.3433935150. The cubic root of 2125241661 is about 1285.6895290489.

Adding to 2125241661 its reverse (1661425212), we get a palindrome (3786666873).

It can be divided in two parts, 212524 and 1661, that added together give a triangular number (214185 = T₆₅₄).

The spelling of 2125241661 in words is "two billion, one hundred twenty-five million, two hundred forty-one thousand, six hundred sixty-one".