625061261 has 4 divisors (see below), whose sum is σ = 681885024. Its totient is φ = 568237500.

The previous prime is 625061257. The next prime is 625061279. The reversal of 625061261 is 162160526.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 625061261 - 2² = 625061257 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (625061231) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28411865 + ... + 28411886.

It is an arithmetic number, because the mean of its divisors is an integer number (170471256).

Almost surely, 2^625061261 is an apocalyptic number.

It is an amenable number.

625061261 is a deficient number, since it is larger than the sum of its proper divisors (56823763).

625061261 is a wasteful number, since it uses less digits than its factorization.

625061261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56823762.

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 625061261 is about 25001.2251899782. The cubic root of 625061261 is about 855.0159070488.

The spelling of 625061261 in words is "six hundred twenty-five million, sixty-one thousand, two hundred sixty-one".