1392157 has 4 divisors (see below), whose sum is σ = 1499260. Its totient is φ = 1285056.

The previous prime is 1392143. The next prime is 1392163. The reversal of 1392157 is 7512931.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 168921 + 1223236 = 411^2 + 1106^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1392157 is a prime.

It is a super-2 number, since 2×1392157² = 3876202225298, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1392197) 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, 53532 + ... + 53557.

It is an arithmetic number, because the mean of its divisors is an integer number (374815).

2^1392157 is an apocalyptic number.

It is an amenable number.

1392157 is a deficient number, since it is larger than the sum of its proper divisors (107103).

1392157 is a wasteful number, since it uses less digits than its factorization.

1392157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107102.

The product of its digits is 1890, while the sum is 28.

The square root of 1392157 is about 1179.8970294055. The cubic root of 1392157 is about 111.6596010480.

The spelling of 1392157 in words is "one million, three hundred ninety-two thousand, one hundred fifty-seven".