1257676849 has 8 divisors (see below), whose sum is σ = 1477550592. Its totient is φ = 1055393040.

The previous prime is 1257676841. The next prime is 1257676853. The reversal of 1257676849 is 9486767521.

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

It is not a de Polignac number, because 1257676849 - 2³ = 1257676841 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1257676849.

It is not an unprimeable number, because it can be changed into a prime (1257676841) 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, 4397329 + ... + 4397614.

It is an arithmetic number, because the mean of its divisors is an integer number (184693824).

Almost surely, 2^1257676849 is an apocalyptic number.

It is an amenable number.

1257676849 is a deficient number, since it is larger than the sum of its proper divisors (219873743).

1257676849 is a wasteful number, since it uses less digits than its factorization.

1257676849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8794967.

The product of its digits is 5080320, while the sum is 55.

The square root of 1257676849 is about 35463.7399184012. The cubic root of 1257676849 is about 1079.4180818587.

The spelling of 1257676849 in words is "one billion, two hundred fifty-seven million, six hundred seventy-six thousand, eight hundred forty-nine".