1221265162 has 8 divisors (see below), whose sum is σ = 1972812996. Its totient is φ = 563660832.

The previous prime is 1221265141. The next prime is 1221265217. The reversal of 1221265162 is 2615621221.

It can be written as a sum of positive squares in 2 ways, for example, as 1220733721 + 531441 = 34939^2 + 729^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 1221265162.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23485843 + ... + 23485894.

Almost surely, 2^1221265162 is an apocalyptic number.

1221265162 is a deficient number, since it is larger than the sum of its proper divisors (751547834).

1221265162 is a wasteful number, since it uses less digits than its factorization.

1221265162 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46971752.

The product of its digits is 2880, while the sum is 28.

The square root of 1221265162 is about 34946.6044416335. The cubic root of 1221265162 is about 1068.8989640771.

Adding to 1221265162 its reverse (2615621221), we get a palindrome (3836886383).

The spelling of 1221265162 in words is "one billion, two hundred twenty-one million, two hundred sixty-five thousand, one hundred sixty-two".