1212420045 has 32 divisors (see below), whose sum is σ = 2071314432. Its totient is φ = 604118592.

The previous prime is 1212420019. The next prime is 1212420047. The reversal of 1212420045 is 5400242121.

1212420045 is nontrivially palindromic in base 14.

It is not a de Polignac number, because 1212420045 - 2⁶ = 1212419981 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212420047) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 26029 + ... + 55698.

It is an arithmetic number, because the mean of its divisors is an integer number (64728576).

Almost surely, 2^1212420045 is an apocalyptic number.

1212420045 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1212420045 is a deficient number, since it is larger than the sum of its proper divisors (858894387).

1212420045 is a wasteful number, since it uses less digits than its factorization.

1212420045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81801.

The product of its (nonzero) digits is 640, while the sum is 21.

The square root of 1212420045 is about 34819.8225871414. The cubic root of 1212420045 is about 1066.3121783747.

Adding to 1212420045 its reverse (5400242121), we get a palindrome (6612662166).

The spelling of 1212420045 in words is "one billion, two hundred twelve million, four hundred twenty thousand, forty-five".