2509251 has 8 divisors (see below), whose sum is σ = 3542544. Its totient is φ = 1574400.

The previous prime is 2509237. The next prime is 2509253. The reversal of 2509251 is 1529052.

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

It is not a de Polignac number, because 2509251 - 2⁵ = 2509219 is a prime.

2509251 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (2509253) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24550 + ... + 24651.

It is an arithmetic number, because the mean of its divisors is an integer number (442818).

2^2509251 is an apocalyptic number.

2509251 is a deficient number, since it is larger than the sum of its proper divisors (1033293).

2509251 is a wasteful number, since it uses less digits than its factorization.

2509251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49221.

The product of its (nonzero) digits is 900, while the sum is 24.

The square root of 2509251 is about 1584.0615518344. The cubic root of 2509251 is about 135.8880819445. Note that the first 3 decimals are identical.

The spelling of 2509251 in words is "two million, five hundred nine thousand, two hundred fifty-one".