1220534452 has 6 divisors (see below), whose sum is σ = 2135935298. Its totient is φ = 610267224.

The previous prime is 1220534443. The next prime is 1220534473. The reversal of 1220534452 is 2544350221.

It can be written as a sum of positive squares in only one way, i.e., 1197436816 + 23097636 = 34604^2 + 4806^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1220534452.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 152566803 + ... + 152566810.

Almost surely, 2^1220534452 is an apocalyptic number.

It is an amenable number.

1220534452 is a deficient number, since it is larger than the sum of its proper divisors (915400846).

1220534452 is a wasteful number, since it uses less digits than its factorization.

1220534452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 305133617 (or 305133615 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 28.

The square root of 1220534452 is about 34936.1482135624. The cubic root of 1220534452 is about 1068.6857395696.

Adding to 1220534452 its reverse (2544350221), we get a palindrome (3764884673).

The spelling of 1220534452 in words is "one billion, two hundred twenty million, five hundred thirty-four thousand, four hundred fifty-two".