1225120343 has 4 divisors (see below), whose sum is σ = 1226388240. Its totient is φ = 1223852448.

The previous prime is 1225120339. The next prime is 1225120409. The reversal of 1225120343 is 3430215221.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1225120343 - 2² = 1225120339 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1225120313) 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, 632498 + ... + 634431.

It is an arithmetic number, because the mean of its divisors is an integer number (306597060).

Almost surely, 2^1225120343 is an apocalyptic number.

1225120343 is a deficient number, since it is larger than the sum of its proper divisors (1267897).

1225120343 is an equidigital number, since it uses as much as digits as its factorization.

1225120343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1267896.

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 1225120343 is about 35001.7191434935. The cubic root of 1225120343 is about 1070.0225176500.

Adding to 1225120343 its reverse (3430215221), we get a palindrome (4655335564).

The spelling of 1225120343 in words is "one billion, two hundred twenty-five million, one hundred twenty thousand, three hundred forty-three".