1442251665 has 12 divisors (see below), whose sum is σ = 2499902964. Its totient is φ = 769200864.

The previous prime is 1442251651. The next prime is 1442251673. The reversal of 1442251665 is 5661522441.

It can be written as a sum of positive squares in 2 ways, for example, as 1015250769 + 427000896 = 31863^2 + 20664^2 .

It is not a de Polignac number, because 1442251665 - 2⁵ = 1442251633 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16024974 + ... + 16025063.

It is an arithmetic number, because the mean of its divisors is an integer number (208325247).

Almost surely, 2^1442251665 is an apocalyptic number.

1442251665 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1442251665 is a deficient number, since it is larger than the sum of its proper divisors (1057651299).

1442251665 is a wasteful number, since it uses less digits than its factorization.

1442251665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32050048 (or 32050045 counting only the distinct ones).

The product of its digits is 57600, while the sum is 36.

The square root of 1442251665 is about 37976.9886246922. The cubic root of 1442251665 is about 1129.8315108903.

The spelling of 1442251665 in words is "one billion, four hundred forty-two million, two hundred fifty-one thousand, six hundred sixty-five".