12801557 has 8 divisors (see below), whose sum is σ = 13305600. Its totient is φ = 12301744.

The previous prime is 12801541. The next prime is 12801559. The reversal of 12801557 is 75510821.

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 12801557 - 2⁴ = 12801541 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12801559) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6008 + ... + 7854.

It is an arithmetic number, because the mean of its divisors is an integer number (1663200).

Almost surely, 2^12801557 is an apocalyptic number.

It is an amenable number.

12801557 is a deficient number, since it is larger than the sum of its proper divisors (504043).

12801557 is a wasteful number, since it uses less digits than its factorization.

12801557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2115.

The product of its (nonzero) digits is 2800, while the sum is 29.

The square root of 12801557 is about 3577.9263547480. The cubic root of 12801557 is about 233.9309034550.

The spelling of 12801557 in words is "twelve million, eight hundred one thousand, five hundred fifty-seven".