1290923442 has 24 divisors (see below), whose sum is σ = 2803507200. Its totient is φ = 429306840.

The previous prime is 1290923393. The next prime is 1290923449. The reversal of 1290923442 is 2443290921.

1290923442 is a `hidden beast` number, since 129 + 0 + 92 + 3 + 442 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 1290923397 and 1290923406.

It is not an unprimeable number, because it can be changed into a prime (1290923449) 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, 75442 + ... + 90957.

It is an arithmetic number, because the mean of its divisors is an integer number (116812800).

Almost surely, 2^1290923442 is an apocalyptic number.

1290923442 is an abundant number, since it is smaller than the sum of its proper divisors (1512583758).

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

1290923442 is a wasteful number, since it uses less digits than its factorization.

1290923442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166838 (or 166835 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 36.

The square root of 1290923442 is about 35929.4230680093. The cubic root of 1290923442 is about 1088.8469252875.

The spelling of 1290923442 in words is "one billion, two hundred ninety million, nine hundred twenty-three thousand, four hundred forty-two".