1655138 has 8 divisors (see below), whose sum is σ = 2488320. Its totient is φ = 825700.

The previous prime is 1655131. The next prime is 1655141. The reversal of 1655138 is 8315561.

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

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 1655138.

It is not an unprimeable number, because it can be changed into a prime (1655131) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 863 + ... + 2013.

It is an arithmetic number, because the mean of its divisors is an integer number (311040).

2^1655138 is an apocalyptic number.

1655138 is a deficient number, since it is larger than the sum of its proper divisors (833182).

1655138 is a wasteful number, since it uses less digits than its factorization.

1655138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1872.

The product of its digits is 3600, while the sum is 29.

The square root of 1655138 is about 1286.5216671320. The cubic root of 1655138 is about 118.2891024713.

The spelling of 1655138 in words is "one million, six hundred fifty-five thousand, one hundred thirty-eight".