13745831 has 4 divisors (see below), whose sum is σ = 14995464. Its totient is φ = 12496200.

The previous prime is 13745819. The next prime is 13745857. The reversal of 13745831 is 13854731.

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 13745831 - 2¹⁰ = 13744807 is a prime.

It is a super-2 number, since 2×13745831² = 377895739761122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13745731) 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, 624800 + ... + 624821.

It is an arithmetic number, because the mean of its divisors is an integer number (3748866).

Almost surely, 2^13745831 is an apocalyptic number.

13745831 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

13745831 is a deficient number, since it is larger than the sum of its proper divisors (1249633).

13745831 is a wasteful number, since it uses less digits than its factorization.

13745831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1249632.

The product of its digits is 10080, while the sum is 32.

The square root of 13745831 is about 3707.5370530852. The cubic root of 13745831 is about 239.5467777640.

Subtracting 13745831 from its reverse (13854731), we obtain a square (108900 = 330²).

The spelling of 13745831 in words is "thirteen million, seven hundred forty-five thousand, eight hundred thirty-one".