6121990 has 32 divisors (see below), whose sum is σ = 13259520. Its totient is φ = 1988064.

The previous prime is 6121957. The next prime is 6122029. The reversal of 6121990 is 991216.

It is a super-3 number, since 3×6121990³ (a number of 21 digits) contains 333 as substring.

It is a congruent number.

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 in 15 ways as a sum of consecutive naturals, for example, 972 + ... + 3631.

It is an arithmetic number, because the mean of its divisors is an integer number (414360).

Almost surely, 2^6121990 is an apocalyptic number.

6121990 is an abundant number, since it is smaller than the sum of its proper divisors (7137530).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6121990 is a wasteful number, since it uses less digits than its factorization.

6121990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4636.

The product of its (nonzero) digits is 972, while the sum is 28.

The square root of 6121990 is about 2474.2655475919. The cubic root of 6121990 is about 182.9353091339.

The spelling of 6121990 in words is "six million, one hundred twenty-one thousand, nine hundred ninety".