251947 has 2 divisors, whose sum is σ = 251948. Its totient is φ = 251946.

The previous prime is 251941. The next prime is 251969. The reversal of 251947 is 749152.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 251947 - 2³ = 251939 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (251941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 125973 + 125974.

It is an arithmetic number, because the mean of its divisors is an integer number (125974).

2²⁵¹⁹⁴⁷ is an apocalyptic number.

251947 is a deficient number, since it is larger than the sum of its proper divisors (1).

251947 is an equidigital number, since it uses as much as digits as its factorization.

251947 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2520, while the sum is 28.

The square root of 251947 is about 501.9432238809. The cubic root of 251947 is about 63.1591675304.

The spelling of 251947 in words is "two hundred fifty-one thousand, nine hundred forty-seven".