1225163001 has 4 divisors (see below), whose sum is σ = 1633550672. Its totient is φ = 816775332.

The previous prime is 1225162993. The next prime is 1225163003. The reversal of 1225163001 is 1003615221.

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.

It is not a de Polignac number, because 1225163001 - 2³ = 1225162993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1225163003) 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, 204193831 + ... + 204193836.

It is an arithmetic number, because the mean of its divisors is an integer number (408387668).

Almost surely, 2^1225163001 is an apocalyptic number.

It is an amenable number.

1225163001 is a deficient number, since it is larger than the sum of its proper divisors (408387671).

1225163001 is an equidigital number, since it uses as much as digits as its factorization.

1225163001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 408387670.

The product of its (nonzero) digits is 360, while the sum is 21.

The square root of 1225163001 is about 35002.3285082578. The cubic root of 1225163001 is about 1070.0349366995.

Adding to 1225163001 its reverse (1003615221), we get a palindrome (2228778222).

The spelling of 1225163001 in words is "one billion, two hundred twenty-five million, one hundred sixty-three thousand, one".