1225351451 has 4 divisors (see below), whose sum is σ = 1225428600. Its totient is φ = 1225274304.

The previous prime is 1225351447. The next prime is 1225351487. The reversal of 1225351451 is 1541535221.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 1541535221 = 929 ⋅1659349.

It is a cyclic number.

It is not a de Polignac number, because 1225351451 - 2² = 1225351447 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1225551451) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5021 + ... + 49758.

It is an arithmetic number, because the mean of its divisors is an integer number (306357150).

Almost surely, 2^1225351451 is an apocalyptic number.

1225351451 is a deficient number, since it is larger than the sum of its proper divisors (77149).

1225351451 is an equidigital number, since it uses as much as digits as its factorization.

1225351451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77148.

The product of its digits is 6000, while the sum is 29.

The square root of 1225351451 is about 35005.0203685129. The cubic root of 1225351451 is about 1070.0897968136.

Adding to 1225351451 its reverse (1541535221), we get a palindrome (2766886672).

The spelling of 1225351451 in words is "one billion, two hundred twenty-five million, three hundred fifty-one thousand, four hundred fifty-one".