1427857369 has 9 divisors (see below), whose sum is σ = 1479927423. Its totient is φ = 1377562872.

The previous prime is 1427857339. The next prime is 1427857397. The reversal of 1427857369 is 9637587241.

The square root of 1427857369 is 37787.

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

It can be written as a sum of positive squares in only one way, i.e., 748733769 + 679123600 = 27363^2 + 26060^2 .

It is not a de Polignac number, because 1427857369 - 2⁵ = 1427857337 is a prime.

It is a super-2 number, since 2×1427857369² = 4077553332415204322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1427857339) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1095172 + ... + 1096474.

Almost surely, 2^1427857369 is an apocalyptic number.

1427857369 is the 37787-th square number.

1427857369 is the 18894-th centered octagonal number.

It is an amenable number.

1427857369 is a deficient number, since it is larger than the sum of its proper divisors (52070054).

1427857369 is an frugal number, since it uses more digits than its factorization.

1427857369 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2664 (or 1332 counting only the distinct ones).

The product of its digits is 2540160, while the sum is 52.

The cubic root of 1427857369 is about 1126.0602006183.

The spelling of 1427857369 in words is "one billion, four hundred twenty-seven million, eight hundred fifty-seven thousand, three hundred sixty-nine".