1392417 has 16 divisors (see below), whose sum is σ = 2222080. Its totient is φ = 856656.

The previous prime is 1392407. The next prime is 1392431. The reversal of 1392417 is 7142931.

It is not a de Polignac number, because 1392417 - 2⁶ = 1392353 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1392407) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 1633 + ... + 2334.

It is an arithmetic number, because the mean of its divisors is an integer number (138880).

2^1392417 is an apocalyptic number.

It is an amenable number.

1392417 is a deficient number, since it is larger than the sum of its proper divisors (829663).

1392417 is a wasteful number, since it uses less digits than its factorization.

1392417 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3989 (or 3983 counting only the distinct ones).

The product of its digits is 1512, while the sum is 27.

The square root of 1392417 is about 1180.0072033678. The cubic root of 1392417 is about 111.6665518179. Note that the first 3 decimals are identical.

It can be divided in two parts, 139 and 2417, that added together give a triangular number (2556 = T₇₁).

The spelling of 1392417 in words is "one million, three hundred ninety-two thousand, four hundred seventeen".