1395545449 has 3 divisors (see below), whose sum is σ = 1395582807. Its totient is φ = 1395508092.

The previous prime is 1395545443. The next prime is 1395545461. The reversal of 1395545449 is 9445455931.

The square root of 1395545449 is 37357.

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., 315240025 + 1080305424 = 17755^2 + 32868^2 .

It is not a de Polignac number, because 1395545449 - 2⁹ = 1395544937 is a prime.

It is a super-2 number, since 2×1395545449² = 3895094200449223202, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1395545443) 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, 18679 + ... + 56035.

It is an arithmetic number, because the mean of its divisors is an integer number (465194269).

Almost surely, 2^1395545449 is an apocalyptic number.

1395545449 is the 37357-th square number.

1395545449 is the 18679-th centered octagonal number.

It is an amenable number.

1395545449 is a deficient number, since it is larger than the sum of its proper divisors (37358).

1395545449 is an frugal number, since it uses more digits than its factorization.

1395545449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74714 (or 37357 counting only the distinct ones).

The product of its digits is 1944000, while the sum is 49.

The cubic root of 1395545449 is about 1117.5011917035.

Multiplying 1395545449 by its sum of digits (49), we get a square (68381727001 = 261499²).

The spelling of 1395545449 in words is "one billion, three hundred ninety-five million, five hundred forty-five thousand, four hundred forty-nine".