1212454042 has 16 divisors (see below), whose sum is σ = 1931136552. Its totient is φ = 568944640.

The previous prime is 1212454013. The next prime is 1212454063. The reversal of 1212454042 is 2404542121.

It can be written as a sum of positive squares in 4 ways, for example, as 782264961 + 430189081 = 27969^2 + 20741^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1212453998 and 1212454016.

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 7 ways as a sum of consecutive naturals, for example, 38509 + ... + 62512.

Almost surely, 2^1212454042 is an apocalyptic number.

1212454042 is a deficient number, since it is larger than the sum of its proper divisors (718682510).

1212454042 is a wasteful number, since it uses less digits than its factorization.

1212454042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101393.

The product of its (nonzero) digits is 2560, while the sum is 25.

The square root of 1212454042 is about 34820.3107682858. The cubic root of 1212454042 is about 1066.3221449635.

Adding to 1212454042 its reverse (2404542121), we get a palindrome (3616996163).

It can be divided in two parts, 12124 and 54042, that added together give a palindrome (66166).

The spelling of 1212454042 in words is "one billion, two hundred twelve million, four hundred fifty-four thousand, forty-two".