8157542 has 4 divisors (see below), whose sum is σ = 12236316. Its totient is φ = 4078770.

The previous prime is 8157533. The next prime is 8157547. The reversal of 8157542 is 2457518.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 8157499 and 8157508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8157547) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2039384 + ... + 2039387.

It is an arithmetic number, because the mean of its divisors is an integer number (3059079).

Almost surely, 2^8157542 is an apocalyptic number.

8157542 is a deficient number, since it is larger than the sum of its proper divisors (4078774).

8157542 is a wasteful number, since it uses less digits than its factorization.

8157542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4078773.

The product of its digits is 11200, while the sum is 32.

The square root of 8157542 is about 2856.1411029569. The cubic root of 8157542 is about 201.3043251873.

The spelling of 8157542 in words is "eight million, one hundred fifty-seven thousand, five hundred forty-two".