1555120 has 40 divisors (see below), whose sum is σ = 4133664. Its totient is φ = 532992.

The previous prime is 1555117. The next prime is 1555123. The reversal of 1555120 is 215551.

It is an interprime number because it is at equal distance from previous prime (1555117) and next prime (1555123).

It is a tau number, because it is divible by the number of its divisors (40).

It is not an unprimeable number, because it can be changed into a prime (1555123) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 829 + ... + 1948.

2^1555120 is an apocalyptic number.

1555120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1555120 is an abundant number, since it is smaller than the sum of its proper divisors (2578544).

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

1555120 is a wasteful number, since it uses less digits than its factorization.

1555120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2797 (or 2791 counting only the distinct ones).

The product of its (nonzero) digits is 250, while the sum is 19.

The square root of 1555120 is about 1247.0445060221. The cubic root of 1555120 is about 115.8567395149.

The spelling of 1555120 in words is "one million, five hundred fifty-five thousand, one hundred twenty".