725951642 has 8 divisors (see below), whose sum is σ = 1172691156. Its totient is φ = 335054592.

The previous prime is 725951573. The next prime is 725951647. The reversal of 725951642 is 246159527.

It can be written as a sum of positive squares in 2 ways, for example, as 723125881 + 2825761 = 26891^2 + 1681^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 725951642.

It is not an unprimeable number, because it can be changed into a prime (725951647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13960583 + ... + 13960634.

Almost surely, 2^725951642 is an apocalyptic number.

725951642 is a deficient number, since it is larger than the sum of its proper divisors (446739514).

725951642 is a wasteful number, since it uses less digits than its factorization.

725951642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27921232.

The product of its digits is 151200, while the sum is 41.

The square root of 725951642 is about 26943.4897888154. The cubic root of 725951642 is about 898.7437790686.

The spelling of 725951642 in words is "seven hundred twenty-five million, nine hundred fifty-one thousand, six hundred forty-two".