13457861 has 4 divisors (see below), whose sum is σ = 13490400. Its totient is φ = 13425324.

The previous prime is 13457849. The next prime is 13457879. The reversal of 13457861 is 16875431.

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, and also an emirpimes, since its reverse is a distinct semiprime: 16875431 = 2663 ⋅6337.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13457861 is a prime.

It is a super-2 number, since 2×13457861² = 362228045390642, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13457831) 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 3 ways as a sum of consecutive naturals, for example, 15641 + ... + 16478.

It is an arithmetic number, because the mean of its divisors is an integer number (3372600).

Almost surely, 2^13457861 is an apocalyptic number.

It is an amenable number.

13457861 is a deficient number, since it is larger than the sum of its proper divisors (32539).

13457861 is an equidigital number, since it uses as much as digits as its factorization.

13457861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32538.

The product of its digits is 20160, while the sum is 35.

The square root of 13457861 is about 3668.4957407635. The cubic root of 13457861 is about 237.8621533048.

The spelling of 13457861 in words is "thirteen million, four hundred fifty-seven thousand, eight hundred sixty-one".