6121618 has 4 divisors (see below), whose sum is σ = 9182430. Its totient is φ = 3060808.

The previous prime is 6121607. The next prime is 6121627. The reversal of 6121618 is 8161216.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 4782969 + 1338649 = 2187^2 + 1157^2 .

It is an alternating number because its digits alternate between even and odd.

It is a junction number, because it is equal to n+sod(n) for n = 6121592 and 6121601.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1530403 + ... + 1530406.

Almost surely, 2^6121618 is an apocalyptic number.

6121618 is a deficient number, since it is larger than the sum of its proper divisors (3060812).

6121618 is a wasteful number, since it uses less digits than its factorization.

6121618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3060811.

The product of its digits is 576, while the sum is 25.

The square root of 6121618 is about 2474.1903726270. The cubic root of 6121618 is about 182.9316037313.

The spelling of 6121618 in words is "six million, one hundred twenty-one thousand, six hundred eighteen".