1440642 has 16 divisors (see below), whose sum is σ = 3292992. Its totient is φ = 411600.

The previous prime is 1440641. The next prime is 1440679. The reversal of 1440642 is 2460441.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (1440641) 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, 17109 + ... + 17192.

It is an arithmetic number, because the mean of its divisors is an integer number (205812).

2^1440642 is an apocalyptic number.

1440642 is an abundant number, since it is smaller than the sum of its proper divisors (1852350).

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

1440642 is a wasteful number, since it uses less digits than its factorization.

1440642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34313.

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 1440642 is about 1200.2674701915. The cubic root of 1440642 is about 112.9411027816.

The spelling of 1440642 in words is "one million, four hundred forty thousand, six hundred forty-two".