1212423144 has 32 divisors (see below), whose sum is σ = 3128835840. Its totient is φ = 391104000.

The previous prime is 1212423137. The next prime is 1212423151. The reversal of 1212423144 is 4413242121.

It is an interprime number because it is at equal distance from previous prime (1212423137) and next prime (1212423151).

It is a super-3 number, since 3×1212423144³ (a number of 28 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 814057 + ... + 815544.

It is an arithmetic number, because the mean of its divisors is an integer number (97776120).

Almost surely, 2^1212423144 is an apocalyptic number.

It is an amenable number.

1212423144 is an abundant number, since it is smaller than the sum of its proper divisors (1916412696).

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

1212423144 is a wasteful number, since it uses less digits than its factorization.

1212423144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1629641 (or 1629637 counting only the distinct ones).

The product of its digits is 1536, while the sum is 24.

The square root of 1212423144 is about 34819.8670876269. The cubic root of 1212423144 is about 1066.3130868878.

Adding to 1212423144 its reverse (4413242121), we get a palindrome (5625665265).

The spelling of 1212423144 in words is "one billion, two hundred twelve million, four hundred twenty-three thousand, one hundred forty-four".