725251061 has 4 divisors (see below), whose sum is σ = 725306400. Its totient is φ = 725195724.

The previous prime is 725251057. The next prime is 725251133. The reversal of 725251061 is 160152527.

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, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 160152527 = 113 ⋅1417279.

It is a cyclic number.

It is not a de Polignac number, because 725251061 - 2² = 725251057 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 (725251001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4310 + ... + 38328.

It is an arithmetic number, because the mean of its divisors is an integer number (181326600).

Almost surely, 2^725251061 is an apocalyptic number.

It is an amenable number.

725251061 is a deficient number, since it is larger than the sum of its proper divisors (55339).

725251061 is a wasteful number, since it uses less digits than its factorization.

725251061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55338.

The product of its (nonzero) digits is 4200, while the sum is 29.

The square root of 725251061 is about 26930.4857178626. The cubic root of 725251061 is about 898.4545745570.

The spelling of 725251061 in words is "seven hundred twenty-five million, two hundred fifty-one thousand, sixty-one".