1221325265 has 8 divisors (see below), whose sum is σ = 1466209728. Its totient is φ = 976647280.

The previous prime is 1221325241. The next prime is 1221325279. The reversal of 1221325265 is 5625231221.

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

It is not a de Polignac number, because 1221325265 - 2⁶ = 1221325201 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38291 + ... + 62520.

It is an arithmetic number, because the mean of its divisors is an integer number (183276216).

Almost surely, 2^1221325265 is an apocalyptic number.

It is an amenable number.

1221325265 is a deficient number, since it is larger than the sum of its proper divisors (244884463).

1221325265 is a wasteful number, since it uses less digits than its factorization.

1221325265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103239.

The product of its digits is 7200, while the sum is 29.

The square root of 1221325265 is about 34947.4643572320. The cubic root of 1221325265 is about 1068.9164986204.

Adding to 1221325265 its reverse (5625231221), we get a palindrome (6846556486).

The spelling of 1221325265 in words is "one billion, two hundred twenty-one million, three hundred twenty-five thousand, two hundred sixty-five".