1246142220 has 24 divisors (see below), whose sum is σ = 3489198384. Its totient is φ = 332304576.

The previous prime is 1246142207. The next prime is 1246142239. The reversal of 1246142220 is 222416421.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10384459 + ... + 10384578.

It is an arithmetic number, because the mean of its divisors is an integer number (145383266).

Almost surely, 2^1246142220 is an apocalyptic number.

1246142220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1246142220 is an abundant number, since it is smaller than the sum of its proper divisors (2243056164).

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

1246142220 is a wasteful number, since it uses less digits than its factorization.

1246142220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20769049 (or 20769047 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 24.

The square root of 1246142220 is about 35300.7396523076. The cubic root of 1246142220 is about 1076.1080250209.

Adding to 1246142220 its reverse (222416421), we get a palindrome (1468558641).

The spelling of 1246142220 in words is "one billion, two hundred forty-six million, one hundred forty-two thousand, two hundred twenty".