1225266645 has 8 divisors (see below), whose sum is σ = 1960426656. Its totient is φ = 653475536.

The previous prime is 1225266643. The next prime is 1225266683. The reversal of 1225266645 is 5466625221.

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 1225266645 - 2¹ = 1225266643 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1225266643) 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, 40842207 + ... + 40842236.

It is an arithmetic number, because the mean of its divisors is an integer number (245053332).

Almost surely, 2^1225266645 is an apocalyptic number.

1225266645 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1225266645 is a deficient number, since it is larger than the sum of its proper divisors (735160011).

1225266645 is an equidigital number, since it uses as much as digits as its factorization.

1225266645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81684451.

The product of its digits is 172800, while the sum is 39.

The square root of 1225266645 is about 35003.8090070209. The cubic root of 1225266645 is about 1070.0651094395.

The spelling of 1225266645 in words is "one billion, two hundred twenty-five million, two hundred sixty-six thousand, six hundred forty-five".