625321261 has 8 divisors (see below), whose sum is σ = 634521600. Its totient is φ = 616153200.

The previous prime is 625321259. The next prime is 625321271. The reversal of 625321261 is 162123526.

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 625321261 - 2¹ = 625321259 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 (625321271) 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, 32436 + ... + 47986.

It is an arithmetic number, because the mean of its divisors is an integer number (79315200).

Almost surely, 2^625321261 is an apocalyptic number.

It is an amenable number.

625321261 is a deficient number, since it is larger than the sum of its proper divisors (9200339).

625321261 is a wasteful number, since it uses less digits than its factorization.

625321261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16139.

The product of its digits is 4320, while the sum is 28.

The square root of 625321261 is about 25006.4243945431. The cubic root of 625321261 is about 855.1344412009.

Adding to 625321261 its reverse (162123526), we get a palindrome (787444787).

The spelling of 625321261 in words is "six hundred twenty-five million, three hundred twenty-one thousand, two hundred sixty-one".