1376530157 has 4 divisors (see below), whose sum is σ = 1379542716. Its totient is φ = 1373517600.

The previous prime is 1376530139. The next prime is 1376530189. The reversal of 1376530157 is 7510356731.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7510356731 = 20101 ⋅373631.

It can be written as a sum of positive squares in 2 ways, for example, as 957345481 + 419184676 = 30941^2 + 20474^2 .

It is a cyclic number.

It is not a de Polignac number, because 1376530157 - 2⁸ = 1376529901 is a prime.

It is a super-3 number, since 3×1376530157³ (a number of 28 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1376530157.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1376530117) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1505594 + ... + 1506507.

It is an arithmetic number, because the mean of its divisors is an integer number (344885679).

Almost surely, 2^1376530157 is an apocalyptic number.

It is an amenable number.

1376530157 is a deficient number, since it is larger than the sum of its proper divisors (3012559).

1376530157 is an equidigital number, since it uses as much as digits as its factorization.

1376530157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3012558.

The product of its (nonzero) digits is 66150, while the sum is 38.

The square root of 1376530157 is about 37101.6193312367. The cubic root of 1376530157 is about 1112.4023819072.

Adding to 1376530157 its reverse (7510356731), we get a palindrome (8886886888).

The spelling of 1376530157 in words is "one billion, three hundred seventy-six million, five hundred thirty thousand, one hundred fifty-seven".