1392481 has 2 divisors, whose sum is σ = 1392482. Its totient is φ = 1392480.

The previous prime is 1392473. The next prime is 1392497. The reversal of 1392481 is 1842931.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1392400 + 81 = 1180^2 + 9^2 .

It is an emirp because it is prime and its reverse (1842931) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1392481 - 2³ = 1392473 is a prime.

It is a super-2 number, since 2×1392481² = 3878006670722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1392431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 696240 + 696241.

It is an arithmetic number, because the mean of its divisors is an integer number (696241).

2^1392481 is an apocalyptic number.

It is an amenable number.

1392481 is a deficient number, since it is larger than the sum of its proper divisors (1).

1392481 is an equidigital number, since it uses as much as digits as its factorization.

1392481 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1728, while the sum is 28.

The square root of 1392481 is about 1180.0343215348. The cubic root of 1392481 is about 111.6682626440.

It can be divided in two parts, 13924 and 81, that multiplied together give a square (1127844 = 1062²).

The spelling of 1392481 in words is "one million, three hundred ninety-two thousand, four hundred eighty-one".