1125420401 has 4 divisors (see below), whose sum is σ = 1286194752. Its totient is φ = 964646052.

The previous prime is 1125420389. The next prime is 1125420419. The reversal of 1125420401 is 1040245211.

It is a happy number.

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: 1040245211 = 71 ⋅14651341.

It is a cyclic number.

It is not a de Polignac number, because 1125420401 - 2¹⁰ = 1125419377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1125420301) 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, 80387165 + ... + 80387178.

It is an arithmetic number, because the mean of its divisors is an integer number (321548688).

Almost surely, 2^1125420401 is an apocalyptic number.

It is an amenable number.

1125420401 is a deficient number, since it is larger than the sum of its proper divisors (160774351).

1125420401 is an equidigital number, since it uses as much as digits as its factorization.

1125420401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160774350.

The product of its (nonzero) digits is 320, while the sum is 20.

The square root of 1125420401 is about 33547.2860452228. The cubic root of 1125420401 is about 1040.1714464023.

Adding to 1125420401 its reverse (1040245211), we get a palindrome (2165665612).

The spelling of 1125420401 in words is "one billion, one hundred twenty-five million, four hundred twenty thousand, four hundred one".