1657142 has 8 divisors (see below), whose sum is σ = 2616600. Its totient is φ = 784944.

The previous prime is 1657129. The next prime is 1657153. The reversal of 1657142 is 2417561.

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

It is a super-2 number, since 2×1657142² = 5492239216328, which contains 22 as substring.

It is an Ulam number.

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, 21767 + ... + 21842.

It is an arithmetic number, because the mean of its divisors is an integer number (327075).

2^1657142 is an apocalyptic number.

1657142 is a deficient number, since it is larger than the sum of its proper divisors (959458).

1657142 is a wasteful number, since it uses less digits than its factorization.

1657142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43630.

The product of its digits is 1680, while the sum is 26.

The square root of 1657142 is about 1287.3002757710. The cubic root of 1657142 is about 118.3368237195.

The spelling of 1657142 in words is "one million, six hundred fifty-seven thousand, one hundred forty-two".