1257264043 has 4 divisors (see below), whose sum is σ = 1436873200. Its totient is φ = 1077654888.

The previous prime is 1257264023. The next prime is 1257264049. The reversal of 1257264043 is 3404627521.

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 1257264043 - 2⁵ = 1257264011 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1257264049) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 89804568 + ... + 89804581.

It is an arithmetic number, because the mean of its divisors is an integer number (359218300).

Almost surely, 2^1257264043 is an apocalyptic number.

1257264043 is a deficient number, since it is larger than the sum of its proper divisors (179609157).

1257264043 is an equidigital number, since it uses as much as digits as its factorization.

1257264043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 179609156.

The product of its (nonzero) digits is 40320, while the sum is 34.

The square root of 1257264043 is about 35457.9193269994. The cubic root of 1257264043 is about 1079.2999701668.

The spelling of 1257264043 in words is "one billion, two hundred fifty-seven million, two hundred sixty-four thousand, forty-three".