1421392 has 50 divisors (see below), whose sum is σ = 3299578. Its totient is φ = 592704.

The previous prime is 1421389. The next prime is 1421401. The reversal of 1421392 is 2931241.

It can be written as a sum of positive squares in only one way, i.e., 1382976 + 38416 = 1176^2 + 196^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 38398 + ... + 38434.

2^1421392 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1421392, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1649789).

1421392 is an abundant number, since it is smaller than the sum of its proper divisors (1878186).

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

1421392 is an frugal number, since it uses more digits than its factorization.

1421392 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73 (or 46 counting only the distinct ones).

The product of its digits is 432, while the sum is 22.

The square root of 1421392 is about 1192.2214559385. The cubic root of 1421392 is about 112.4358020556.

The spelling of 1421392 in words is "one million, four hundred twenty-one thousand, three hundred ninety-two".