1275668442 has 24 divisors (see below), whose sum is σ = 2777055840. Its totient is φ = 423206280.

The previous prime is 1275668393. The next prime is 1275668447. The reversal of 1275668442 is 2448665721.

1275668442 is a `hidden beast` number, since 1 + 2 + 7 + 566 + 84 + 4 + 2 = 666.

It is not an unprimeable number, because it can be changed into a prime (1275668447) 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, 164142 + ... + 171737.

It is an arithmetic number, because the mean of its divisors is an integer number (115710660).

Almost surely, 2^1275668442 is an apocalyptic number.

1275668442 is an abundant number, since it is smaller than the sum of its proper divisors (1501387398).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1275668442 is a wasteful number, since it uses less digits than its factorization.

1275668442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 336098 (or 336095 counting only the distinct ones).

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

The square root of 1275668442 is about 35716.5009764394. The cubic root of 1275668442 is about 1084.5409065247.

The spelling of 1275668442 in words is "one billion, two hundred seventy-five million, six hundred sixty-eight thousand, four hundred forty-two".