725251 has 4 divisors (see below), whose sum is σ = 727272. Its totient is φ = 723232.

The previous prime is 725209. The next prime is 725273. The reversal of 725251 is 152527.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 152527 = 127 ⋅1201.

It is a cyclic number.

It is not a de Polignac number, because 725251 - 2¹⁷ = 594179 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (725201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 310 + ... + 1243.

It is an arithmetic number, because the mean of its divisors is an integer number (181818).

2⁷²⁵²⁵¹ is an apocalyptic number.

725251 is a deficient number, since it is larger than the sum of its proper divisors (2021).

725251 is a wasteful number, since it uses less digits than its factorization.

725251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2020.

The product of its digits is 700, while the sum is 22.

The square root of 725251 is about 851.6166978166. The cubic root of 725251 is about 89.8454549368.

Adding to 725251 its reverse (152527), we get a palindrome (877778).

The spelling of 725251 in words is "seven hundred twenty-five thousand, two hundred fifty-one".