1225066451 has 4 divisors (see below), whose sum is σ = 1400075952. Its totient is φ = 1050056952.

The previous prime is 1225066387. The next prime is 1225066483. The reversal of 1225066451 is 1546605221.

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

It is not a de Polignac number, because 1225066451 - 2⁶ = 1225066387 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1225060451) 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, 87504740 + ... + 87504753.

It is an arithmetic number, because the mean of its divisors is an integer number (350018988).

Almost surely, 2^1225066451 is an apocalyptic number.

1225066451 is a deficient number, since it is larger than the sum of its proper divisors (175009501).

1225066451 is an equidigital number, since it uses as much as digits as its factorization.

1225066451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 175009500.

The product of its (nonzero) digits is 14400, while the sum is 32.

The square root of 1225066451 is about 35000.9492871265. The cubic root of 1225066451 is about 1070.0068276270.

The spelling of 1225066451 in words is "one billion, two hundred twenty-five million, sixty-six thousand, four hundred fifty-one".