1212452451 has 24 divisors (see below), whose sum is σ = 2050330464. Its totient is φ = 675930240.

The previous prime is 1212452389. The next prime is 1212452473. The reversal of 1212452451 is 1542542121.

It is a happy number.

1212452451 is a `hidden beast` number, since 12 + 124 + 524 + 5 + 1 = 666.

It is not a de Polignac number, because 1212452451 - 2¹⁸ = 1212190307 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1212452551) 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, 232116 + ... + 237281.

It is an arithmetic number, because the mean of its divisors is an integer number (85430436).

Almost surely, 2^1212452451 is an apocalyptic number.

1212452451 is a deficient number, since it is larger than the sum of its proper divisors (837878013).

1212452451 is a wasteful number, since it uses less digits than its factorization.

1212452451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 469451 (or 469448 counting only the distinct ones).

The product of its digits is 3200, while the sum is 27.

The square root of 1212452451 is about 34820.2879224167. The cubic root of 1212452451 is about 1066.3216785488.

Adding to 1212452451 its reverse (1542542121), we get a palindrome (2754994572).

It can be divided in two parts, 1212452 and 451, that added together give a triangular number (1212903 = T₁₅₅₇).

The spelling of 1212452451 in words is "one billion, two hundred twelve million, four hundred fifty-two thousand, four hundred fifty-one".