158402 has 4 divisors (see below), whose sum is σ = 237606. Its totient is φ = 79200.

The previous prime is 158393. The next prime is 158407. The reversal of 158402 is 204851.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 204851 = 127 ⋅1613.

It can be written as a sum of positive squares in only one way, i.e., 109561 + 48841 = 331^2 + 221^2 .

It is an Ulam number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 158402.

It is not an unprimeable number, because it can be changed into a prime (158407) by changing a digit.

158402 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39599 + ... + 39602.

2¹⁵⁸⁴⁰² is an apocalyptic number.

158402 is a deficient number, since it is larger than the sum of its proper divisors (79204).

158402 is an equidigital number, since it uses as much as digits as its factorization.

158402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79203.

The product of its (nonzero) digits is 320, while the sum is 20.

The square root of 158402 is about 397.9974874293. The cubic root of 158402 is about 54.1070123011.

The spelling of 158402 in words is "one hundred fifty-eight thousand, four hundred two".