1506644 has 12 divisors (see below), whose sum is σ = 2652468. Its totient is φ = 748800.

The previous prime is 1506641. The next prime is 1506649. The reversal of 1506644 is 4466051.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 211600 + 1295044 = 460^2 + 1138^2 .

It is a super-2 number, since 2×1506644² = 4539952285472, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1506641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 317 + ... + 1764.

It is an arithmetic number, because the mean of its divisors is an integer number (221039).

2^1506644 is an apocalyptic number.

It is an amenable number.

1506644 is a deficient number, since it is larger than the sum of its proper divisors (1145824).

1506644 is a wasteful number, since it uses less digits than its factorization.

1506644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2266 (or 2264 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 1506644 is about 1227.4542761341. The cubic root of 1506644 is about 114.6401860310.

The spelling of 1506644 in words is "one million, five hundred six thousand, six hundred forty-four".