157276681 has 3 divisors (see below), whose sum is σ = 157289223. Its totient is φ = 157264140.

The previous prime is 157276667. The next prime is 157276687. The reversal of 157276681 is 186672751.

The square root of 157276681 is 12541.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 186672751 = 2179 ⋅85669.

It can be written as a sum of positive squares in only one way, i.e., 135932281 + 21344400 = 11659^2 + 4620^2 .

It is a de Polignac number, because none of the positive numbers 2^k-157276681 is a prime.

It is a super-2 number, since 2×157276681² = 49471908772751522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (157276687) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 6271 + ... + 18811.

It is an arithmetic number, because the mean of its divisors is an integer number (52429741).

Almost surely, 2^157276681 is an apocalyptic number.

157276681 is the 12541-st square number.

157276681 is the 6271-st centered octagonal number.

It is an amenable number.

157276681 is a deficient number, since it is larger than the sum of its proper divisors (12542).

157276681 is an frugal number, since it uses more digits than its factorization.

157276681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25082 (or 12541 counting only the distinct ones).

The product of its digits is 141120, while the sum is 43.

The cubic root of 157276681 is about 539.7857872345.

The spelling of 157276681 in words is "one hundred fifty-seven million, two hundred seventy-six thousand, six hundred eighty-one".