1392281 has 8 divisors (see below), whose sum is σ = 1551744. Its totient is φ = 1238320.

The previous prime is 1392277. The next prime is 1392311. The reversal of 1392281 is 1822931.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1392281 - 2² = 1392277 is a prime.

It is a super-2 number, since 2×1392281² = 3876892765922, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1392281.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1392221) 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, 830 + ... + 1863.

It is an arithmetic number, because the mean of its divisors is an integer number (193968).

2^1392281 is an apocalyptic number.

1392281 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1392281 is a deficient number, since it is larger than the sum of its proper divisors (159463).

1392281 is a wasteful number, since it uses less digits than its factorization.

1392281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2751.

The product of its digits is 864, while the sum is 26.

The square root of 1392281 is about 1179.9495751938. The cubic root of 1392281 is about 111.6629161385.

The spelling of 1392281 in words is "one million, three hundred ninety-two thousand, two hundred eighty-one".