1392121 has 4 divisors (see below), whose sum is σ = 1452672. Its totient is φ = 1331572.

The previous prime is 1392103. The next prime is 1392133. The reversal of 1392121 is 1212931.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1392121 - 2⁵ = 1392089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1392101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30241 + ... + 30286.

It is an arithmetic number, because the mean of its divisors is an integer number (363168).

2^1392121 is an apocalyptic number.

It is an amenable number.

1392121 is a deficient number, since it is larger than the sum of its proper divisors (60551).

1392121 is an equidigital number, since it uses as much as digits as its factorization.

1392121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60550.

The product of its digits is 108, while the sum is 19.

The square root of 1392121 is about 1179.8817737384. The cubic root of 1392121 is about 111.6586385654.

The spelling of 1392121 in words is "one million, three hundred ninety-two thousand, one hundred twenty-one".