12958649 has 4 divisors (see below), whose sum is σ = 14136720. Its totient is φ = 11780580.

The previous prime is 12958633. The next prime is 12958691. The reversal of 12958649 is 94685921.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12958649 - 2⁴ = 12958633 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12958349) 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, 589019 + ... + 589040.

It is an arithmetic number, because the mean of its divisors is an integer number (3534180).

Almost surely, 2^12958649 is an apocalyptic number.

It is an amenable number.

12958649 is a deficient number, since it is larger than the sum of its proper divisors (1178071).

12958649 is a wasteful number, since it uses less digits than its factorization.

12958649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1178070.

The product of its digits is 155520, while the sum is 44.

The square root of 12958649 is about 3599.8123562208. The cubic root of 12958649 is about 234.8838961708.

The spelling of 12958649 in words is "twelve million, nine hundred fifty-eight thousand, six hundred forty-nine".