1442686257 has 12 divisors (see below), whose sum is σ = 2087628660. Its totient is φ = 960060768.

The previous prime is 1442686241. The next prime is 1442686279. The reversal of 1442686257 is 7526862441.

1442686257 is a `hidden beast` number, since 14 + 4 + 2 + 6 + 8 + 625 + 7 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 714172176 + 728514081 = 26724^2 + 26991^2 .

It is not a de Polignac number, because 1442686257 - 2⁴ = 1442686241 is a prime.

It is a super-2 number, since 2×1442686257² = 4162687272273340098, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1442686057) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 138882 + ... + 148907.

It is an arithmetic number, because the mean of its divisors is an integer number (173969055).

Almost surely, 2^1442686257 is an apocalyptic number.

It is an amenable number.

1442686257 is a deficient number, since it is larger than the sum of its proper divisors (644942403).

1442686257 is a wasteful number, since it uses less digits than its factorization.

1442686257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 288352 (or 288349 counting only the distinct ones).

The product of its digits is 645120, while the sum is 45.

The square root of 1442686257 is about 37982.7099744081. The cubic root of 1442686257 is about 1129.9449830942.

The spelling of 1442686257 in words is "one billion, four hundred forty-two million, six hundred eighty-six thousand, two hundred fifty-seven".