1142668385 has 8 divisors (see below), whose sum is σ = 1378778856. Its totient is φ = 909083520.

The previous prime is 1142668363. The next prime is 1142668427. The reversal of 1142668385 is 5838662411.

It can be written as a sum of positive squares in 4 ways, for example, as 74097664 + 1068570721 = 8608^2 + 32689^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-1142668385 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 630404 + ... + 632213.

It is an arithmetic number, because the mean of its divisors is an integer number (172347357).

Almost surely, 2^1142668385 is an apocalyptic number.

It is an amenable number.

1142668385 is a deficient number, since it is larger than the sum of its proper divisors (236110471).

1142668385 is a wasteful number, since it uses less digits than its factorization.

1142668385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1262803.

The product of its digits is 276480, while the sum is 44.

The square root of 1142668385 is about 33803.3783075006. The cubic root of 1142668385 is about 1045.4583537548.

The spelling of 1142668385 in words is "one billion, one hundred forty-two million, six hundred sixty-eight thousand, three hundred eighty-five".