1225545611 has 8 divisors (see below), whose sum is σ = 1234796544. Its totient is φ = 1216313280.

The previous prime is 1225545577. The next prime is 1225545613. The reversal of 1225545611 is 1165455221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1225545611 - 2¹⁰ = 1225544587 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1225545613) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 145526 + ... + 153716.

It is an arithmetic number, because the mean of its divisors is an integer number (154349568).

Almost surely, 2^1225545611 is an apocalyptic number.

1225545611 is a deficient number, since it is larger than the sum of its proper divisors (9250933).

1225545611 is an equidigital number, since it uses as much as digits as its factorization.

1225545611 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9301.

The product of its digits is 12000, while the sum is 32.

The square root of 1225545611 is about 35007.7935751455. The cubic root of 1225545611 is about 1070.1463132962.

The spelling of 1225545611 in words is "one billion, two hundred twenty-five million, five hundred forty-five thousand, six hundred eleven".