1257130722 has 32 divisors (see below), whose sum is σ = 2734117632. Its totient is φ = 383733504.

The previous prime is 1257130703. The next prime is 1257130723. The reversal of 1257130722 is 2270317521.

It is a self number, because there is not a number n which added to its sum of digits gives 1257130722.

It is not an unprimeable number, because it can be changed into a prime (1257130723) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 162778 + ... + 170325.

It is an arithmetic number, because the mean of its divisors is an integer number (85441176).

Almost surely, 2^1257130722 is an apocalyptic number.

1257130722 is an abundant number, since it is smaller than the sum of its proper divisors (1476986910).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1257130722 is a wasteful number, since it uses less digits than its factorization.

1257130722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 333162.

The product of its (nonzero) digits is 5880, while the sum is 30.

The square root of 1257130722 is about 35456.0392881100. The cubic root of 1257130722 is about 1079.2618189557.

The spelling of 1257130722 in words is "one billion, two hundred fifty-seven million, one hundred thirty thousand, seven hundred twenty-two".