1011264251 has 2 divisors, whose sum is σ = 1011264252. Its totient is φ = 1011264250.

The previous prime is 1011264203. The next prime is 1011264257. The reversal of 1011264251 is 1524621101.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1011264251 is a prime.

It is not a weakly prime, because it can be changed into another prime (1011264257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 505632125 + 505632126.

It is an arithmetic number, because the mean of its divisors is an integer number (505632126).

Almost surely, 2^1011264251 is an apocalyptic number.

1011264251 is a deficient number, since it is larger than the sum of its proper divisors (1).

1011264251 is an equidigital number, since it uses as much as digits as its factorization.

1011264251 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 480, while the sum is 23.

The square root of 1011264251 is about 31800.3813027454. The cubic root of 1011264251 is about 1003.7407397512.

Adding to 1011264251 its reverse (1524621101), we get a palindrome (2535885352).

The spelling of 1011264251 in words is "one billion, eleven million, two hundred sixty-four thousand, two hundred fifty-one".