1290020903 has 8 divisors (see below), whose sum is σ = 1363603200. Its totient is φ = 1217007288.

The previous prime is 1290020869. The next prime is 1290020909. The reversal of 1290020903 is 3090200921.

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 1290020903 - 2¹⁰ = 1290019879 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 (1290020909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 137501 + ... + 146582.

It is an arithmetic number, because the mean of its divisors is an integer number (170450400).

Almost surely, 2^1290020903 is an apocalyptic number.

1290020903 is a deficient number, since it is larger than the sum of its proper divisors (73582297).

1290020903 is a wasteful number, since it uses less digits than its factorization.

1290020903 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 284341.

The product of its (nonzero) digits is 972, while the sum is 26.

The square root of 1290020903 is about 35916.8609847798. The cubic root of 1290020903 is about 1088.5931131987.

The spelling of 1290020903 in words is "one billion, two hundred ninety million, twenty thousand, nine hundred three".