1150320251 has 2 divisors, whose sum is σ = 1150320252. Its totient is φ = 1150320250.

The previous prime is 1150320247. The next prime is 1150320263. The reversal of 1150320251 is 1520230511.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1150320251 - 2² = 1150320247 is a prime.

It is not a weakly prime, because it can be changed into another prime (1150320221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 575160125 + 575160126.

It is an arithmetic number, because the mean of its divisors is an integer number (575160126).

Almost surely, 2^1150320251 is an apocalyptic number.

1150320251 is a deficient number, since it is larger than the sum of its proper divisors (1).

1150320251 is an equidigital number, since it uses as much as digits as its factorization.

1150320251 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 300, while the sum is 20.

The square root of 1150320251 is about 33916.3714303285. The cubic root of 1150320251 is about 1047.7867973706.

Adding to 1150320251 its reverse (1520230511), we get a palindrome (2670550762).

The spelling of 1150320251 in words is "one billion, one hundred fifty million, three hundred twenty thousand, two hundred fifty-one".