1551480 has 64 divisors (see below), whose sum is σ = 5322240. Its totient is φ = 354432.

The previous prime is 1551479. The next prime is 1551497. The reversal of 1551480 is 841551.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 1551480.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 84 + ... + 1763.

It is an arithmetic number, because the mean of its divisors is an integer number (83160).

2^1551480 is an apocalyptic number.

1551480 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1551480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2661120).

1551480 is an abundant number, since it is smaller than the sum of its proper divisors (3770760).

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

1551480 is a wasteful number, since it uses less digits than its factorization.

1551480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1868 (or 1864 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 24.

The square root of 1551480 is about 1245.5842002852. The cubic root of 1551480 is about 115.7662753293.

The spelling of 1551480 in words is "one million, five hundred fifty-one thousand, four hundred eighty".