1220420252 has 12 divisors (see below), whose sum is σ = 2136069936. Its totient is φ = 610114560.

The previous prime is 1220420233. The next prime is 1220420261. The reversal of 1220420252 is 2520240221.

It is a congruent number.

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, 10268 + ... + 50460.

It is an arithmetic number, because the mean of its divisors is an integer number (178005828).

Almost surely, 2^1220420252 is an apocalyptic number.

It is an amenable number.

1220420252 is a deficient number, since it is larger than the sum of its proper divisors (915649684).

1220420252 is a wasteful number, since it uses less digits than its factorization.

1220420252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47788 (or 47786 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 20.

The square root of 1220420252 is about 34934.5137650433. The cubic root of 1220420252 is about 1068.6524078004.

Adding to 1220420252 its reverse (2520240221), we get a palindrome (3740660473).

The spelling of 1220420252 in words is "one billion, two hundred twenty million, four hundred twenty thousand, two hundred fifty-two".