13745949 has 32 divisors (see below), whose sum is σ = 22548480. Its totient is φ = 7273152.

The previous prime is 13745929. The next prime is 13745957. The reversal of 13745949 is 94954731.

13745949 = 17² + 18² + ... + 345².

It is not a de Polignac number, because 13745949 - 2¹¹ = 13743901 is a prime.

It is a super-2 number, since 2×13745949² = 377902227821202, which contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 13745949.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13745929) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 18387 + ... + 19119.

It is an arithmetic number, because the mean of its divisors is an integer number (704640).

Almost surely, 2^13745949 is an apocalyptic number.

13745949 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

13745949 is a deficient number, since it is larger than the sum of its proper divisors (8802531).

13745949 is a wasteful number, since it uses less digits than its factorization.

13745949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 809.

The product of its digits is 136080, while the sum is 42.

The square root of 13745949 is about 3707.5529665805. The cubic root of 13745949 is about 239.5474632188.

The spelling of 13745949 in words is "thirteen million, seven hundred forty-five thousand, nine hundred forty-nine".