2157542 has 8 divisors (see below), whose sum is σ = 3348000. Its totient is φ = 1041544.

The previous prime is 2157539. The next prime is 2157557. The reversal of 2157542 is 2457512.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18542 + ... + 18657.

It is an arithmetic number, because the mean of its divisors is an integer number (418500).

2^2157542 is an apocalyptic number.

2157542 is a deficient number, since it is larger than the sum of its proper divisors (1190458).

2157542 is a wasteful number, since it uses less digits than its factorization.

2157542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37230.

The product of its digits is 2800, while the sum is 26.

The square root of 2157542 is about 1468.8573790535. The cubic root of 2157542 is about 129.2170294531.

The spelling of 2157542 in words is "two million, one hundred fifty-seven thousand, five hundred forty-two".