13121949 has 8 divisors (see below), whose sum is σ = 18099360. Its totient is φ = 8446256.

The previous prime is 13121921. The next prime is 13121971. The reversal of 13121949 is 94912131.

13121949 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

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 13121949 - 2¹¹ = 13119901 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13120949) 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, 75327 + ... + 75500.

It is an arithmetic number, because the mean of its divisors is an integer number (2262420).

Almost surely, 2^13121949 is an apocalyptic number.

It is an amenable number.

13121949 is a deficient number, since it is larger than the sum of its proper divisors (4977411).

13121949 is a wasteful number, since it uses less digits than its factorization.

13121949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150859.

The product of its digits is 1944, while the sum is 30.

The square root of 13121949 is about 3622.4230840696. The cubic root of 13121949 is about 235.8664199050.

The spelling of 13121949 in words is "thirteen million, one hundred twenty-one thousand, nine hundred forty-nine".