6151220 has 24 divisors (see below), whose sum is σ = 12965064. Its totient is φ = 2451456.

The previous prime is 6151217. The next prime is 6151241. The reversal of 6151220 is 221516.

It can be written as a sum of positive squares in 4 ways, for example, as 1106704 + 5044516 = 1052^2 + 2246^2 .

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 8804 + ... + 9476.

It is an arithmetic number, because the mean of its divisors is an integer number (540211).

Almost surely, 2^6151220 is an apocalyptic number.

It is an amenable number.

6151220 is an abundant number, since it is smaller than the sum of its proper divisors (6813844).

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

6151220 is a wasteful number, since it uses less digits than its factorization.

6151220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1139 (or 1137 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 6151220 is about 2480.1653170706. The cubic root of 6151220 is about 183.2259940995.

Adding to 6151220 its reverse (221516), we get a palindrome (6372736).

The spelling of 6151220 in words is "six million, one hundred fifty-one thousand, two hundred twenty".