Subtracting 157942 from its reverse (249751), we obtain a square (91809 = 3032).
It is a happy number.
It is a sphenic number, since it is the product of 3 distinct primes.
It is a self number, because there is not a number n which added to its sum of digits gives 157942.
It is a congruent number.
It is an unprimeable number.
2157942 is an apocalyptic number.
157942 is a wasteful number, since it uses less digits than its factorization.
157942 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 662.
The square root of 157942 is about 397.4191741726. The cubic root of 157942 is about 54.0545858641.
The spelling of 157942 in words is "one hundred fifty-seven thousand, nine hundred forty-two".