6121978 has 4 divisors (see below), whose sum is σ = 9182970. Its totient is φ = 3060988.

The previous prime is 6121957. The next prime is 6122029. The reversal of 6121978 is 8791216.

It is a happy number.

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., 5793649 + 328329 = 2407^2 + 573^2 .

It is a super-2 number, since 2×6121978² = 74957229264968, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1530493 + ... + 1530496.

Almost surely, 2^6121978 is an apocalyptic number.

6121978 is a deficient number, since it is larger than the sum of its proper divisors (3060992).

6121978 is a wasteful number, since it uses less digits than its factorization.

6121978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3060991.

The product of its digits is 6048, while the sum is 34.

The square root of 6121978 is about 2474.2631226286. The cubic root of 6121978 is about 182.9351896071.

The spelling of 6121978 in words is "six million, one hundred twenty-one thousand, nine hundred seventy-eight".