71142154 has 4 divisors (see below), whose sum is σ = 106713234. Its totient is φ = 35571076.

The previous prime is 71142143. The next prime is 71142193. The reversal of 71142154 is 45124117.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 45124117 = 241 ⋅187237.

It can be written as a sum of positive squares in only one way, i.e., 61074225 + 10067929 = 7815^2 + 3173^2 .

It is a super-2 number, since 2×71142154² = 10122412151519432, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17785537 + ... + 17785540.

Almost surely, 2^71142154 is an apocalyptic number.

71142154 is a deficient number, since it is larger than the sum of its proper divisors (35571080).

71142154 is a wasteful number, since it uses less digits than its factorization.

71142154 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35571079.

The product of its digits is 1120, while the sum is 25.

The square root of 71142154 is about 8434.5808431718. The cubic root of 71142154 is about 414.3579446111.

The spelling of 71142154 in words is "seventy-one million, one hundred forty-two thousand, one hundred fifty-four".