1254536643 has 8 divisors (see below), whose sum is σ = 1708305408. Its totient is φ = 818562824.

The previous prime is 1254536627. The next prime is 1254536663. The reversal of 1254536643 is 3466354521.

1254536643 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1254536643 - 2⁴ = 1254536627 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1254536623) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4448571 + ... + 4448852.

It is an arithmetic number, because the mean of its divisors is an integer number (213538176).

Almost surely, 2^1254536643 is an apocalyptic number.

1254536643 is a deficient number, since it is larger than the sum of its proper divisors (453768765).

1254536643 is an equidigital number, since it uses as much as digits as its factorization.

1254536643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8897473.

The product of its digits is 259200, while the sum is 39.

The square root of 1254536643 is about 35419.4387730805. The cubic root of 1254536643 is about 1078.5189584362.

The spelling of 1254536643 in words is "one billion, two hundred fifty-four million, five hundred thirty-six thousand, six hundred forty-three".