1396442161 has 3 divisors (see below), whose sum is σ = 1396479531. Its totient is φ = 1396404792.

The previous prime is 1396442153. The next prime is 1396442189. The reversal of 1396442161 is 1612446931.

The square root of 1396442161 is 37369.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 1110155761 + 286286400 = 33319^2 + 16920^2 .

It is not a de Polignac number, because 1396442161 - 2³ = 1396442153 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 1396442161.

It is not an unprimeable number, because it can be changed into a prime (1396442141) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 18685 + ... + 56053.

It is an arithmetic number, because the mean of its divisors is an integer number (465493177).

Almost surely, 2^1396442161 is an apocalyptic number.

1396442161 is the 37369-th square number.

1396442161 is the 18685-th centered octagonal number.

It is an amenable number.

1396442161 is a deficient number, since it is larger than the sum of its proper divisors (37370).

1396442161 is an frugal number, since it uses more digits than its factorization.

1396442161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74738 (or 37369 counting only the distinct ones).

The product of its digits is 31104, while the sum is 37.

The cubic root of 1396442161 is about 1117.7404917269.

The spelling of 1396442161 in words is "one billion, three hundred ninety-six million, four hundred forty-two thousand, one hundred sixty-one".