1254261651 has 4 divisors (see below), whose sum is σ = 1672348872. Its totient is φ = 836174432.

The previous prime is 1254261637. The next prime is 1254261653. The reversal of 1254261651 is 1561624521.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1254261651 - 2⁷ = 1254261523 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1254261653) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 209043606 + ... + 209043611.

It is an arithmetic number, because the mean of its divisors is an integer number (418087218).

Almost surely, 2^1254261651 is an apocalyptic number.

1254261651 is a deficient number, since it is larger than the sum of its proper divisors (418087221).

1254261651 is an equidigital number, since it uses as much as digits as its factorization.

1254261651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 418087220.

The product of its digits is 14400, while the sum is 33.

The square root of 1254261651 is about 35415.5566241729. The cubic root of 1254261651 is about 1078.4401495895.

The spelling of 1254261651 in words is "one billion, two hundred fifty-four million, two hundred sixty-one thousand, six hundred fifty-one".