1442664 has 32 divisors (see below), whose sum is σ = 4008000. Its totient is φ = 480816.

The previous prime is 1442657. The next prime is 1442669. The reversal of 1442664 is 4662441.

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

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (1442669) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3124 + ... + 3555.

It is an arithmetic number, because the mean of its divisors is an integer number (125250).

2^1442664 is an apocalyptic number.

It is an amenable number.

1442664 is an abundant number, since it is smaller than the sum of its proper divisors (2565336).

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

1442664 is a wasteful number, since it uses less digits than its factorization.

1442664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6694 (or 6684 counting only the distinct ones).

The product of its digits is 4608, while the sum is 27.

The square root of 1442664 is about 1201.1094870993. The cubic root of 1442664 is about 112.9939172333.

The spelling of 1442664 in words is "one million, four hundred forty-two thousand, six hundred sixty-four".