1225125443 has 4 divisors (see below), whose sum is σ = 1240633440. Its totient is φ = 1209617448.

The previous prime is 1225125431. The next prime is 1225125449. The reversal of 1225125443 is 3445215221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3445215221 = 7 ⋅492173603.

It is a cyclic number.

It is not a de Polignac number, because 1225125443 - 2¹⁴ = 1225109059 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1225125449) 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, 7753880 + ... + 7754037.

It is an arithmetic number, because the mean of its divisors is an integer number (310158360).

Almost surely, 2^1225125443 is an apocalyptic number.

1225125443 is a deficient number, since it is larger than the sum of its proper divisors (15507997).

1225125443 is an equidigital number, since it uses as much as digits as its factorization.

1225125443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15507996.

The product of its digits is 9600, while the sum is 29.

The square root of 1225125443 is about 35001.7919969821. The cubic root of 1225125443 is about 1070.0240024313.

The spelling of 1225125443 in words is "one billion, two hundred twenty-five million, one hundred twenty-five thousand, four hundred forty-three".