1290553391 has 8 divisors (see below), whose sum is σ = 1347049440. Its totient is φ = 1234089472.

The previous prime is 1290553373. The next prime is 1290553417. The reversal of 1290553391 is 1933550921.

It is a happy number.

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

It is not a de Polignac number, because 1290553391 - 2¹⁴ = 1290537007 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 (1290552391) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 113075 + ... + 123963.

It is an arithmetic number, because the mean of its divisors is an integer number (168381180).

Almost surely, 2^1290553391 is an apocalyptic number.

1290553391 is a deficient number, since it is larger than the sum of its proper divisors (56496049).

1290553391 is a wasteful number, since it uses less digits than its factorization.

1290553391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16065.

The product of its (nonzero) digits is 36450, while the sum is 38.

The square root of 1290553391 is about 35924.2730058661. The cubic root of 1290553391 is about 1088.7428738291.

The spelling of 1290553391 in words is "one billion, two hundred ninety million, five hundred fifty-three thousand, three hundred ninety-one".