1264651 has 2 divisors, whose sum is σ = 1264652. Its totient is φ = 1264650.

The previous prime is 1264649. The next prime is 1264657. The reversal of 1264651 is 1564621.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1264651 - 2¹ = 1264649 is a prime.

Together with 1264649, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1264657) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 632325 + 632326.

It is an arithmetic number, because the mean of its divisors is an integer number (632326).

2^1264651 is an apocalyptic number.

1264651 is a deficient number, since it is larger than the sum of its proper divisors (1).

1264651 is an equidigital number, since it uses as much as digits as its factorization.

1264651 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1440, while the sum is 25.

The square root of 1264651 is about 1124.5670277934. The cubic root of 1264651 is about 108.1409624824.

The spelling of 1264651 in words is "one million, two hundred sixty-four thousand, six hundred fifty-one".