915251 has 2 divisors, whose sum is σ = 915252. Its totient is φ = 915250.

The previous prime is 915247. The next prime is 915253. The reversal of 915251 is 152519.

It is a strong prime.

It is an emirp because it is prime and its reverse (152519) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 915251 - 2² = 915247 is a prime.

Together with 915253, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (915253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 457625 + 457626.

It is an arithmetic number, because the mean of its divisors is an integer number (457626).

2⁹¹⁵²⁵¹ is an apocalyptic number.

915251 is a deficient number, since it is larger than the sum of its proper divisors (1).

915251 is an equidigital number, since it uses as much as digits as its factorization.

915251 is an evil number, because the sum of its binary digits is even.

The product of its digits is 450, while the sum is 23.

The square root of 915251 is about 956.6875142908. The cubic root of 915251 is about 97.0912451365.

The spelling of 915251 in words is "nine hundred fifteen thousand, two hundred fifty-one".