725725951 has 4 divisors (see below), whose sum is σ = 728737504. Its totient is φ = 722714400.

The previous prime is 725725943. The next prime is 725725963. The reversal of 725725951 is 159527527.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 159527527 = 631 ⋅252817.

It is a cyclic number.

It is not a de Polignac number, because 725725951 - 2³ = 725725943 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 725725898 and 725725907.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (725725991) 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, 1505415 + ... + 1505896.

It is an arithmetic number, because the mean of its divisors is an integer number (182184376).

Almost surely, 2^725725951 is an apocalyptic number.

725725951 is a deficient number, since it is larger than the sum of its proper divisors (3011553).

725725951 is a wasteful number, since it uses less digits than its factorization.

725725951 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3011552.

The product of its digits is 220500, while the sum is 43.

The square root of 725725951 is about 26939.3012344418. The cubic root of 725725951 is about 898.6506326411.

The spelling of 725725951 in words is "seven hundred twenty-five million, seven hundred twenty-five thousand, nine hundred fifty-one".