1550664 has 40 divisors (see below), whose sum is σ = 4345110. Its totient is φ = 516672.

The previous prime is 1550663. The next prime is 1550669. The reversal of 1550664 is 4660551.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1542564 + 8100 = 1242^2 + 90^2 .

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (1550663) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 549 + ... + 1844.

2^1550664 is an apocalyptic number.

It is an amenable number.

1550664 is an abundant number, since it is smaller than the sum of its proper divisors (2794446).

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

1550664 is a wasteful number, since it uses less digits than its factorization.

1550664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2411 (or 2398 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The square root of 1550664 is about 1245.2566000628. The cubic root of 1550664 is about 115.7459760351.

The spelling of 1550664 in words is "one million, five hundred fifty thousand, six hundred sixty-four".