1552640 has 36 divisors (see below), whose sum is σ = 3722124. Its totient is φ = 620544.

The previous prime is 1552619. The next prime is 1552643. The reversal of 1552640 is 462551.

It can be written as a sum of positive squares in 2 ways, for example, as 262144 + 1290496 = 512^2 + 1136^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1552643) 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, 674 + ... + 1886.

2^1552640 is an apocalyptic number.

1552640 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 1552640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1861062).

1552640 is an abundant number, since it is smaller than the sum of its proper divisors (2169484).

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

1552640 is an equidigital number, since it uses as much as digits as its factorization.

1552640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1234 (or 1220 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 1552640 is about 1246.0497582360. The cubic root of 1552640 is about 115.7951199219.

The spelling of 1552640 in words is "one million, five hundred fifty-two thousand, six hundred forty".