2501765129 has 2 divisors, whose sum is σ = 2501765130. Its totient is φ = 2501765128.

The previous prime is 2501765113. The next prime is 2501765137. The reversal of 2501765129 is 9215671052.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2148137104 + 353628025 = 46348^2 + 18805^2 .

It is a cyclic number.

It is not a de Polignac number, because 2501765129 - 2⁴ = 2501765113 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2501765092 and 2501765101.

It is not a weakly prime, because it can be changed into another prime (2501725129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1250882564 + 1250882565.

It is an arithmetic number, because the mean of its divisors is an integer number (1250882565).

Almost surely, 2^2501765129 is an apocalyptic number.

It is an amenable number.

2501765129 is a deficient number, since it is larger than the sum of its proper divisors (1).

2501765129 is an equidigital number, since it uses as much as digits as its factorization.

2501765129 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 37800, while the sum is 38.

The square root of 2501765129 is about 50017.6481754190. The cubic root of 2501765129 is about 1357.5281529682.

The spelling of 2501765129 in words is "two billion, five hundred one million, seven hundred sixty-five thousand, one hundred twenty-nine".