12961407 has 4 divisors (see below), whose sum is σ = 17281880. Its totient is φ = 8640936.

The previous prime is 12961393. The next prime is 12961423. The reversal of 12961407 is 70416921.

It is a happy number.

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

It is not a de Polignac number, because 12961407 - 2⁶ = 12961343 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 (12961457) 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, 2160232 + ... + 2160237.

It is an arithmetic number, because the mean of its divisors is an integer number (4320470).

Almost surely, 2^12961407 is an apocalyptic number.

12961407 is a deficient number, since it is larger than the sum of its proper divisors (4320473).

12961407 is an equidigital number, since it uses as much as digits as its factorization.

12961407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4320472.

The product of its (nonzero) digits is 3024, while the sum is 30.

The square root of 12961407 is about 3600.1954113631. The cubic root of 12961407 is about 234.9005585001.

The spelling of 12961407 in words is "twelve million, nine hundred sixty-one thousand, four hundred seven".