1225450001 has 4 divisors (see below), whose sum is σ = 1246220400. Its totient is φ = 1204679604.

The previous prime is 1225449997. The next prime is 1225450007. The reversal of 1225450001 is 1000545221.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1000545221 = 13 ⋅76965017.

It is a cyclic number.

It is not a de Polignac number, because 1225450001 - 2² = 1225449997 is a prime.

It is a super-3 number, since 3×1225450001³ (a number of 28 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1225450007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10385111 + ... + 10385228.

It is an arithmetic number, because the mean of its divisors is an integer number (311555100).

Almost surely, 2^1225450001 is an apocalyptic number.

It is an amenable number.

1225450001 is a deficient number, since it is larger than the sum of its proper divisors (20770399).

1225450001 is an equidigital number, since it uses as much as digits as its factorization.

1225450001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20770398.

The product of its (nonzero) digits is 400, while the sum is 20.

The square root of 1225450001 is about 35006.4279954411. The cubic root of 1225450001 is about 1070.1184836915.

Adding to 1225450001 its reverse (1000545221), we get a palindrome (2225995222).

The spelling of 1225450001 in words is "one billion, two hundred twenty-five million, four hundred fifty thousand, one".