1125203601 has 4 divisors (see below), whose sum is σ = 1500271472. Its totient is φ = 750135732.

The previous prime is 1125203551. The next prime is 1125203603. The reversal of 1125203601 is 1063025211.

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 1125203601 - 2⁶ = 1125203537 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1125203603) 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, 187533931 + ... + 187533936.

It is an arithmetic number, because the mean of its divisors is an integer number (375067868).

Almost surely, 2^1125203601 is an apocalyptic number.

It is an amenable number.

1125203601 is a deficient number, since it is larger than the sum of its proper divisors (375067871).

1125203601 is an equidigital number, since it uses as much as digits as its factorization.

1125203601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 375067870.

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

The square root of 1125203601 is about 33544.0546296956. The cubic root of 1125203601 is about 1040.1046495408.

Adding to 1125203601 its reverse (1063025211), we get a palindrome (2188228812).

The spelling of 1125203601 in words is "one billion, one hundred twenty-five million, two hundred three thousand, six hundred one".