2125342309 has 16 divisors (see below), whose sum is σ = 2204375040. Its totient is φ = 2048056560.

The previous prime is 2125342291. The next prime is 2125342313. The reversal of 2125342309 is 9032435212.

It is a cyclic number.

It is not a de Polignac number, because 2125342309 - 2²³ = 2116953701 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2125342319) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 880314 + ... + 882724.

It is an arithmetic number, because the mean of its divisors is an integer number (137773440).

Almost surely, 2^2125342309 is an apocalyptic number.

It is an amenable number.

2125342309 is a deficient number, since it is larger than the sum of its proper divisors (79032731).

2125342309 is a wasteful number, since it uses less digits than its factorization.

2125342309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2760.

The product of its (nonzero) digits is 12960, while the sum is 31.

The square root of 2125342309 is about 46101.4349993577. The cubic root of 2125342309 is about 1285.7098247858.

The spelling of 2125342309 in words is "two billion, one hundred twenty-five million, three hundred forty-two thousand, three hundred nine".