1246664420 has 12 divisors (see below), whose sum is σ = 2617995324. Its totient is φ = 498665760.

The previous prime is 1246664401. The next prime is 1246664429. The reversal of 1246664420 is 244666421.

It can be written as a sum of positive squares in 2 ways, for example, as 191324224 + 1055340196 = 13832^2 + 32486^2 .

It is not an unprimeable number, because it can be changed into a prime (1246664429) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31166591 + ... + 31166630.

It is an arithmetic number, because the mean of its divisors is an integer number (218166277).

Almost surely, 2^1246664420 is an apocalyptic number.

1246664420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1246664420 is an abundant number, since it is smaller than the sum of its proper divisors (1371330904).

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

1246664420 is a wasteful number, since it uses less digits than its factorization.

1246664420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62333230 (or 62333228 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 35.

The square root of 1246664420 is about 35308.1353231801. The cubic root of 1246664420 is about 1076.2583195660.

The spelling of 1246664420 in words is "one billion, two hundred forty-six million, six hundred sixty-four thousand, four hundred twenty".