1257357077 has 8 divisors (see below), whose sum is σ = 1389203136. Its totient is φ = 1131942592.

The previous prime is 1257357067. The next prime is 1257357103. The reversal of 1257357077 is 7707537521.

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 1257357077 - 2¹⁸ = 1257094933 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1257357067) 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, 1607483 + ... + 1608264.

It is an arithmetic number, because the mean of its divisors is an integer number (173650392).

Almost surely, 2^1257357077 is an apocalyptic number.

1257357077 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

1257357077 is a deficient number, since it is larger than the sum of its proper divisors (131846059).

1257357077 is a wasteful number, since it uses less digits than its factorization.

1257357077 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3215787.

The product of its (nonzero) digits is 360150, while the sum is 44.

The square root of 1257357077 is about 35459.2311958395. The cubic root of 1257357077 is about 1079.3265912301.

The spelling of 1257357077 in words is "one billion, two hundred fifty-seven million, three hundred fifty-seven thousand, seventy-seven".