1392641 has 8 divisors (see below), whose sum is σ = 1441440. Its totient is φ = 1344672.

The previous prime is 1392631. The next prime is 1392649. The reversal of 1392641 is 1462931.

1392641 = 33² + 34² + ... + 161².

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 1392641 - 2¹⁴ = 1376257 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1392641.

It is not an unprimeable number, because it can be changed into a prime (1392649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5861 + ... + 6093.

It is an arithmetic number, because the mean of its divisors is an integer number (180180).

It is a Proth number, since it is equal to 85 ⋅ 2¹⁴ + 1 and 85 < 2¹⁴.

2^1392641 is an apocalyptic number.

It is an amenable number.

1392641 is a deficient number, since it is larger than the sum of its proper divisors (48799).

1392641 is a wasteful number, since it uses less digits than its factorization.

1392641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 415.

The product of its digits is 1296, while the sum is 26.

The square root of 1392641 is about 1180.1021142257. The cubic root of 1392641 is about 111.6725394797.

The spelling of 1392641 in words is "one million, three hundred ninety-two thousand, six hundred forty-one".