12561011 has 8 divisors (see below), whose sum is σ = 13379904. Its totient is φ = 11751040.

The previous prime is 12561007. The next prime is 12561023. The reversal of 12561011 is 11016521.

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 12561011 - 2² = 12561007 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12561061) 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, 806 + ... + 5076.

It is an arithmetic number, because the mean of its divisors is an integer number (1672488).

Almost surely, 2^12561011 is an apocalyptic number.

12561011 is a deficient number, since it is larger than the sum of its proper divisors (818893).

12561011 is a wasteful number, since it uses less digits than its factorization.

12561011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4461.

The product of its (nonzero) digits is 60, while the sum is 17.

The square root of 12561011 is about 3544.1516615405. The cubic root of 12561011 is about 232.4564129954.

Adding to 12561011 its reverse (11016521), we get a palindrome (23577532).

The spelling of 12561011 in words is "twelve million, five hundred sixty-one thousand, eleven".