1511920 has 20 divisors (see below), whose sum is σ = 3515400. Its totient is φ = 604736.

The previous prime is 1511911. The next prime is 1511921. The reversal of 1511920 is 291151.

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1511921) 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, 9370 + ... + 9529.

It is an arithmetic number, because the mean of its divisors is an integer number (175770).

2^1511920 is an apocalyptic number.

1511920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1511920 is an abundant number, since it is smaller than the sum of its proper divisors (2003480).

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

1511920 is a wasteful number, since it uses less digits than its factorization.

1511920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18912 (or 18906 counting only the distinct ones).

The product of its (nonzero) digits is 90, while the sum is 19.

The square root of 1511920 is about 1229.6015614824. The cubic root of 1511920 is about 114.7738466648.

It can be divided in two parts, 15 and 11920, that added together give a triangular number (11935 = T₁₅₄).

The spelling of 1511920 in words is "one million, five hundred eleven thousand, nine hundred twenty".