1257532516 has 6 divisors (see below), whose sum is σ = 2200681910. Its totient is φ = 628766256.

The previous prime is 1257532513. The next prime is 1257532519. The reversal of 1257532516 is 6152357521.

It is an interprime number because it is at equal distance from previous prime (1257532513) and next prime (1257532519).

It can be written as a sum of positive squares in only one way, i.e., 1194393600 + 63138916 = 34560^2 + 7946^2 .

It is not an unprimeable number, because it can be changed into a prime (1257532513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157191561 + ... + 157191568.

Almost surely, 2^1257532516 is an apocalyptic number.

It is an amenable number.

1257532516 is a deficient number, since it is larger than the sum of its proper divisors (943149394).

1257532516 is a wasteful number, since it uses less digits than its factorization.

1257532516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 314383133 (or 314383131 counting only the distinct ones).

The product of its digits is 63000, while the sum is 37.

The square root of 1257532516 is about 35461.7049223525. The cubic root of 1257532516 is about 1079.3767883658.

The spelling of 1257532516 in words is "one billion, two hundred fifty-seven million, five hundred thirty-two thousand, five hundred sixteen".