7725251 has 4 divisors (see below), whose sum is σ = 7904952. Its totient is φ = 7545552.

The previous prime is 7725241. The next prime is 7725269. The reversal of 7725251 is 1525277.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1525277 = 13 ⋅117329.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7725251 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7725241) 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, 89786 + ... + 89871.

It is an arithmetic number, because the mean of its divisors is an integer number (1976238).

Almost surely, 2^7725251 is an apocalyptic number.

7725251 is a deficient number, since it is larger than the sum of its proper divisors (179701).

7725251 is a wasteful number, since it uses less digits than its factorization.

7725251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 179700.

The product of its digits is 4900, while the sum is 29.

The square root of 7725251 is about 2779.4335753891. The cubic root of 7725251 is about 197.6837023892.

The spelling of 7725251 in words is "seven million, seven hundred twenty-five thousand, two hundred fifty-one".