1212153142 has 32 divisors (see below), whose sum is σ = 1970609472. Its totient is φ = 557067264.

The previous prime is 1212153133. The next prime is 1212153149. The reversal of 1212153142 is 2413512121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212153149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 418423 + ... + 421309.

It is an arithmetic number, because the mean of its divisors is an integer number (61581546).

Almost surely, 2^1212153142 is an apocalyptic number.

1212153142 is a deficient number, since it is larger than the sum of its proper divisors (758456330).

1212153142 is a wasteful number, since it uses less digits than its factorization.

1212153142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3192.

The product of its digits is 480, while the sum is 22.

The square root of 1212153142 is about 34815.9897460922. The cubic root of 1212153142 is about 1066.2339263950.

Adding to 1212153142 its reverse (2413512121), we get a palindrome (3625665263).

The spelling of 1212153142 in words is "one billion, two hundred twelve million, one hundred fifty-three thousand, one hundred forty-two".