1392240 has 40 divisors (see below), whose sum is σ = 4316688. Its totient is φ = 371200.

The previous prime is 1392233. The next prime is 1392253. The reversal of 1392240 is 422931.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2661 + ... + 3140.

2^1392240 is an apocalyptic number.

1392240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1392240 is an abundant number, since it is smaller than the sum of its proper divisors (2924448).

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

1392240 is a wasteful number, since it uses less digits than its factorization.

1392240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5817 (or 5811 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 1392240 is about 1179.9322014421. The cubic root of 1392240 is about 111.6618200416.

The spelling of 1392240 in words is "one million, three hundred ninety-two thousand, two hundred forty".