1555164 has 36 divisors (see below), whose sum is σ = 4234776. Its totient is φ = 478368.

The previous prime is 1555163. The next prime is 1555187. The reversal of 1555164 is 4615551.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1555163) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1194 + ... + 2129.

2^1555164 is an apocalyptic number.

It is an amenable number.

1555164 is an abundant number, since it is smaller than the sum of its proper divisors (2679612).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1555164 is a wasteful number, since it uses less digits than its factorization.

1555164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3346 (or 3341 counting only the distinct ones).

The product of its digits is 3000, while the sum is 27.

The square root of 1555164 is about 1247.0621476093. The cubic root of 1555164 is about 115.8578321741.

The spelling of 1555164 in words is "one million, five hundred fifty-five thousand, one hundred sixty-four".