12969551 has 4 divisors (see below), whose sum is σ = 14822352. Its totient is φ = 11116752.

The previous prime is 12969547. The next prime is 12969553. The reversal of 12969551 is 15596921.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12969551 - 2² = 12969547 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 (12969553) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 926390 + ... + 926403.

It is an arithmetic number, because the mean of its divisors is an integer number (3705588).

Almost surely, 2^12969551 is an apocalyptic number.

12969551 is a deficient number, since it is larger than the sum of its proper divisors (1852801).

12969551 is an equidigital number, since it uses as much as digits as its factorization.

12969551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1852800.

The product of its digits is 24300, while the sum is 38.

The square root of 12969551 is about 3601.3262834684. The cubic root of 12969551 is about 234.9497463087.

The spelling of 12969551 in words is "twelve million, nine hundred sixty-nine thousand, five hundred fifty-one".