1257354545 has 8 divisors (see below), whose sum is σ = 1588237440. Its totient is φ = 952942320.

The previous prime is 1257354541. The next prime is 1257354551. The reversal of 1257354545 is 5454537521.

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

It is not a de Polignac number, because 1257354545 - 2² = 1257354541 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1257354541) 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, 6617561 + ... + 6617750.

It is an arithmetic number, because the mean of its divisors is an integer number (198529680).

Almost surely, 2^1257354545 is an apocalyptic number.

It is an amenable number.

1257354545 is a deficient number, since it is larger than the sum of its proper divisors (330882895).

1257354545 is a wasteful number, since it uses less digits than its factorization.

1257354545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13235335.

The product of its digits is 420000, while the sum is 41.

The square root of 1257354545 is about 35459.1954928478. The cubic root of 1257354545 is about 1079.3258667324.

The spelling of 1257354545 in words is "one billion, two hundred fifty-seven million, three hundred fifty-four thousand, five hundred forty-five".