1212404004 has 48 divisors (see below), whose sum is σ = 3592310400. Its totient is φ = 346400928.

The previous prime is 1212403993. The next prime is 1212404027. The reversal of 1212404004 is 4004042121.

1212404004 is a `hidden beast` number, since 1 + 21 + 240 + 400 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

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, 801099 + ... + 802610.

It is an arithmetic number, because the mean of its divisors is an integer number (74839800).

Almost surely, 2^1212404004 is an apocalyptic number.

1212404004 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1212404004 is an abundant number, since it is smaller than the sum of its proper divisors (2379906396).

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

1212404004 is a wasteful number, since it uses less digits than its factorization.

1212404004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1603729 (or 1603721 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

The square root of 1212404004 is about 34819.5922434482. The cubic root of 1212404004 is about 1066.3074757171.

Adding to 1212404004 its reverse (4004042121), we get a palindrome (5216446125).

The spelling of 1212404004 in words is "one billion, two hundred twelve million, four hundred four thousand, four".