6121491 has 4 divisors (see below), whose sum is σ = 8161992. Its totient is φ = 4080992.

The previous prime is 6121487. The next prime is 6121501. The reversal of 6121491 is 1941216.

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 6121491 - 2² = 6121487 is a prime.

It is a D-number.

It is not an unprimeable number, because it can be changed into a prime (6121441) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 1020246 + ... + 1020251.

It is an arithmetic number, because the mean of its divisors is an integer number (2040498).

Almost surely, 2^6121491 is an apocalyptic number.

6121491 is a deficient number, since it is larger than the sum of its proper divisors (2040501).

6121491 is a wasteful number, since it uses less digits than its factorization.

6121491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2040500.

The product of its digits is 432, while the sum is 24.

The square root of 6121491 is about 2474.1647075326. The cubic root of 6121491 is about 182.9303386804.

The spelling of 6121491 in words is "six million, one hundred twenty-one thousand, four hundred ninety-one".