71942157 has 24 divisors (see below), whose sum is σ = 120396224. Its totient is φ = 40544064.

The previous prime is 71942153. The next prime is 71942161. The reversal of 71942157 is 75124917.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (71942153) and next prime (71942161).

It is not a de Polignac number, because 71942157 - 2² = 71942153 is a prime.

It is a house number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71942153) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3223 + ... + 12420.

Almost surely, 2^71942157 is an apocalyptic number.

It is an amenable number.

71942157 is a deficient number, since it is larger than the sum of its proper divisors (48454067).

71942157 is a wasteful number, since it uses less digits than its factorization.

71942157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15729 (or 15726 counting only the distinct ones).

The product of its digits is 17640, while the sum is 36.

The square root of 71942157 is about 8481.8722579393. The cubic root of 71942157 is about 415.9053289408.

The spelling of 71942157 in words is "seventy-one million, nine hundred forty-two thousand, one hundred fifty-seven".