1212452251 has 4 divisors (see below), whose sum is σ = 1226075400. Its totient is φ = 1198829104.

The previous prime is 1212452249. The next prime is 1212452281. The reversal of 1212452251 is 1522542121.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1212452251 - 2¹ = 1212452249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1212452281) 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 3 ways as a sum of consecutive naturals, for example, 6811441 + ... + 6811618.

It is an arithmetic number, because the mean of its divisors is an integer number (306518850).

Almost surely, 2^1212452251 is an apocalyptic number.

1212452251 is a deficient number, since it is larger than the sum of its proper divisors (13623149).

1212452251 is an equidigital number, since it uses as much as digits as its factorization.

1212452251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13623148.

The product of its digits is 1600, while the sum is 25.

The square root of 1212452251 is about 34820.2850505277. The cubic root of 1212452251 is about 1066.3216199171.

Adding to 1212452251 its reverse (1522542121), we get a palindrome (2734994372).

The spelling of 1212452251 in words is "one billion, two hundred twelve million, four hundred fifty-two thousand, two hundred fifty-one".