725103257 has 4 divisors (see below), whose sum is σ = 726101376. Its totient is φ = 724105140.

The previous prime is 725103241. The next prime is 725103287. The reversal of 725103257 is 752301527.

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 725103257 - 2⁴ = 725103241 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (725103287) 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, 497969 + ... + 499422.

It is an arithmetic number, because the mean of its divisors is an integer number (181525344).

Almost surely, 2^725103257 is an apocalyptic number.

It is an amenable number.

725103257 is a deficient number, since it is larger than the sum of its proper divisors (998119).

725103257 is an equidigital number, since it uses as much as digits as its factorization.

725103257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 998118.

The product of its (nonzero) digits is 14700, while the sum is 32.

The square root of 725103257 is about 26927.7414017589. The cubic root of 725103257 is about 898.3935362908.

The spelling of 725103257 in words is "seven hundred twenty-five million, one hundred three thousand, two hundred fifty-seven".