1264544951 has 2 divisors, whose sum is σ = 1264544952. Its totient is φ = 1264544950.

The previous prime is 1264544927. The next prime is 1264544959. The reversal of 1264544951 is 1594454621.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1264544951 is a prime.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 1264544899 and 1264544908.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1264544959) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 632272475 + 632272476.

It is an arithmetic number, because the mean of its divisors is an integer number (632272476).

Almost surely, 2^1264544951 is an apocalyptic number.

1264544951 is a deficient number, since it is larger than the sum of its proper divisors (1).

1264544951 is an equidigital number, since it uses as much as digits as its factorization.

1264544951 is an evil number, because the sum of its binary digits is even.

The product of its digits is 172800, while the sum is 41.

The square root of 1264544951 is about 35560.4408156029. The cubic root of 1264544951 is about 1081.3793962954.

The spelling of 1264544951 in words is "one billion, two hundred sixty-four million, five hundred forty-four thousand, nine hundred fifty-one".