1212400402 has 8 divisors (see below), whose sum is σ = 1844214912. Its totient is φ = 597662100.

The previous prime is 1212400367. The next prime is 1212400411. The reversal of 1212400402 is 2040042121.

It is a sphenic number, since it is the product of 3 distinct primes.

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 3 ways as a sum of consecutive naturals, for example, 4268874 + ... + 4269157.

It is an arithmetic number, because the mean of its divisors is an integer number (230526864).

Almost surely, 2^1212400402 is an apocalyptic number.

1212400402 is a deficient number, since it is larger than the sum of its proper divisors (631814510).

1212400402 is an equidigital number, since it uses as much as digits as its factorization.

1212400402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8538104.

The product of its (nonzero) digits is 128, while the sum is 16.

The square root of 1212400402 is about 34819.5405196565. The cubic root of 1212400402 is about 1066.3064197315.

Adding to 1212400402 its reverse (2040042121), we get a palindrome (3252442523).

The spelling of 1212400402 in words is "one billion, two hundred twelve million, four hundred thousand, four hundred two".