1290942157 has 8 divisors (see below), whose sum is σ = 1308210176. Its totient is φ = 1273765392.

The previous prime is 1290942151. The next prime is 1290942179. The reversal of 1290942157 is 7512490921.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 1290942157 - 2²³ = 1282553549 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1290942151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5908 + ... + 51154.

It is an arithmetic number, because the mean of its divisors is an integer number (163526272).

Almost surely, 2^1290942157 is an apocalyptic number.

It is an amenable number.

1290942157 is a deficient number, since it is larger than the sum of its proper divisors (17268019).

1290942157 is a wasteful number, since it uses less digits than its factorization.

1290942157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45627.

The product of its (nonzero) digits is 45360, while the sum is 40.

The square root of 1290942157 is about 35929.6835082081. The cubic root of 1290942157 is about 1088.8521870691.

The spelling of 1290942157 in words is "one billion, two hundred ninety million, nine hundred forty-two thousand, one hundred fifty-seven".