71370157 has 4 divisors (see below), whose sum is σ = 71394300. Its totient is φ = 71346016.

The previous prime is 71370119. The next prime is 71370161. The reversal of 71370157 is 75107317.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 75107317 = 233 ⋅322349.

It can be written as a sum of positive squares in 2 ways, for example, as 26894596 + 44475561 = 5186^2 + 6669^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71370157 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71370107) 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, 6898 + ... + 13795.

It is an arithmetic number, because the mean of its divisors is an integer number (17848575).

Almost surely, 2^71370157 is an apocalyptic number.

71370157 is the 6898-th pentagonal number.

It is an amenable number.

71370157 is a deficient number, since it is larger than the sum of its proper divisors (24143).

71370157 is a wasteful number, since it uses less digits than its factorization.

71370157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24142.

The product of its (nonzero) digits is 5145, while the sum is 31.

The square root of 71370157 is about 8448.0859962479. The cubic root of 71370157 is about 414.8001302033.

The spelling of 71370157 in words is "seventy-one million, three hundred seventy thousand, one hundred fifty-seven".