1220264 has 8 divisors (see below), whose sum is σ = 2288010. Its totient is φ = 610128.

The previous prime is 1220257. The next prime is 1220309. The reversal of 1220264 is 4620221.

It can be written as a sum of positive squares in only one way, i.e., 917764 + 302500 = 958^2 + 550^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 76259 + ... + 76274.

2^1220264 is an apocalyptic number.

It is an amenable number.

1220264 is a deficient number, since it is larger than the sum of its proper divisors (1067746).

1220264 is a wasteful number, since it uses less digits than its factorization.

1220264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152539 (or 152535 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 1220264 is about 1104.6556024391. The cubic root of 1220264 is about 106.8606798866.

Adding to 1220264 its reverse (4620221), we get a palindrome (5840485).

The spelling of 1220264 in words is "one million, two hundred twenty thousand, two hundred sixty-four".