2521245739 has 2 divisors, whose sum is σ = 2521245740. Its totient is φ = 2521245738.

The previous prime is 2521245731. The next prime is 2521245743. The reversal of 2521245739 is 9375421252.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2521245739 - 2³ = 2521245731 is a prime.

It is a super-2 number, since 2×2521245739² = 12713360152851312242, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2521245731) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1260622869 + 1260622870.

It is an arithmetic number, because the mean of its divisors is an integer number (1260622870).

Almost surely, 2^2521245739 is an apocalyptic number.

2521245739 is a deficient number, since it is larger than the sum of its proper divisors (1).

2521245739 is an equidigital number, since it uses as much as digits as its factorization.

2521245739 is an evil number, because the sum of its binary digits is even.

The product of its digits is 151200, while the sum is 40.

The square root of 2521245739 is about 50212.0079164337. The cubic root of 2521245739 is about 1361.0426223069.

The spelling of 2521245739 in words is "two billion, five hundred twenty-one million, two hundred forty-five thousand, seven hundred thirty-nine".