1257350139 has 6 divisors (see below), whose sum is σ = 1816172436. Its totient is φ = 838233420.

The previous prime is 1257350123. The next prime is 1257350189. The reversal of 1257350139 is 9310537521.

1257350139 is a `hidden beast` number, since 1 + 2 + 573 + 50 + 1 + 39 = 666.

It is not a de Polignac number, because 1257350139 - 2⁴ = 1257350123 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1257350189) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 69852777 + ... + 69852794.

It is an arithmetic number, because the mean of its divisors is an integer number (302695406).

Almost surely, 2^1257350139 is an apocalyptic number.

1257350139 is a deficient number, since it is larger than the sum of its proper divisors (558822297).

1257350139 is a wasteful number, since it uses less digits than its factorization.

1257350139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139705577 (or 139705574 counting only the distinct ones).

The product of its (nonzero) digits is 28350, while the sum is 36.

The square root of 1257350139 is about 35459.1333650443. The cubic root of 1257350139 is about 1079.3246060126.

The spelling of 1257350139 in words is "one billion, two hundred fifty-seven million, three hundred fifty thousand, one hundred thirty-nine".