13857481 has 8 divisors (see below), whose sum is σ = 15469344. Its totient is φ = 12304320.

The previous prime is 13857461. The next prime is 13857509. The reversal of 13857481 is 18475831.

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 13857481 - 2¹¹ = 13855433 is a prime.

It is a super-2 number, since 2×13857481² = 384059559330722, which contains 22 as substring.

It is a pancake number, because a pancake can be divided into 13857481 parts by 5264 straight cuts.

It is a self number, because there is not a number n which added to its sum of digits gives 13857481.

It is not an unprimeable number, because it can be changed into a prime (13857401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14176 + ... + 15121.

It is an arithmetic number, because the mean of its divisors is an integer number (1933668).

Almost surely, 2^13857481 is an apocalyptic number.

13857481 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

13857481 is a deficient number, since it is larger than the sum of its proper divisors (1611863).

13857481 is a wasteful number, since it uses less digits than its factorization.

13857481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29351.

The product of its digits is 26880, while the sum is 37.

The square root of 13857481 is about 3722.5637670831. The cubic root of 13857481 is about 240.1935995751.

The spelling of 13857481 in words is "thirteen million, eight hundred fifty-seven thousand, four hundred eighty-one".