1220406532 has 6 divisors (see below), whose sum is σ = 2135711438. Its totient is φ = 610203264.

The previous prime is 1220406493. The next prime is 1220406581. The reversal of 1220406532 is 2356040221.

It can be written as a sum of positive squares in only one way, i.e., 860014276 + 360392256 = 29326^2 + 18984^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1220406497 and 1220406506.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 152550813 + ... + 152550820.

Almost surely, 2^1220406532 is an apocalyptic number.

It is an amenable number.

1220406532 is a deficient number, since it is larger than the sum of its proper divisors (915304906).

1220406532 is a wasteful number, since it uses less digits than its factorization.

1220406532 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 305101637 (or 305101635 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 1220406532 is about 34934.3173970811. The cubic root of 1220406532 is about 1068.6484031782.

Adding to 1220406532 its reverse (2356040221), we get a palindrome (3576446753).

The spelling of 1220406532 in words is "one billion, two hundred twenty million, four hundred six thousand, five hundred thirty-two".