1290028901 has 16 divisors (see below), whose sum is σ = 1562198400. Its totient is φ = 1039925760.

The previous prime is 1290028889. The next prime is 1290028903. The reversal of 1290028901 is 1098200921.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1290028901 - 2³⁰ = 216287077 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1290028903) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 201650 + ... + 207948.

It is an arithmetic number, because the mean of its divisors is an integer number (97637400).

Almost surely, 2^1290028901 is an apocalyptic number.

It is an amenable number.

1290028901 is a deficient number, since it is larger than the sum of its proper divisors (272169499).

1290028901 is a wasteful number, since it uses less digits than its factorization.

1290028901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8044.

The product of its (nonzero) digits is 2592, while the sum is 32.

The square root of 1290028901 is about 35916.9723250722. The cubic root of 1290028901 is about 1088.5953629167.

The spelling of 1290028901 in words is "one billion, two hundred ninety million, twenty-eight thousand, nine hundred one".