1212253427 has 24 divisors (see below), whose sum is σ = 1536926976. Its totient is φ = 928908000.

The previous prime is 1212253411. The next prime is 1212253439. The reversal of 1212253427 is 7243522121.

It is not a de Polignac number, because 1212253427 - 2⁴ = 1212253411 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1212253427.

It is not an unprimeable number, because it can be changed into a prime (1212253457) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 284402 + ... + 288632.

It is an arithmetic number, because the mean of its divisors is an integer number (64038624).

Almost surely, 2^1212253427 is an apocalyptic number.

1212253427 is a deficient number, since it is larger than the sum of its proper divisors (324673549).

1212253427 is an equidigital number, since it uses as much as digits as its factorization.

1212253427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4371 (or 4310 counting only the distinct ones).

The product of its digits is 6720, while the sum is 29.

The square root of 1212253427 is about 34817.4299309986. The cubic root of 1212253427 is about 1066.2633298087.

Adding to 1212253427 its reverse (7243522121), we get a palindrome (8455775548).

The spelling of 1212253427 in words is "one billion, two hundred twelve million, two hundred fifty-three thousand, four hundred twenty-seven".