1221532 has 24 divisors (see below), whose sum is σ = 2332400. Its totient is φ = 559728.

The previous prime is 1221527. The next prime is 1221533. The reversal of 1221532 is 2351221.

1221532 is nontrivially palindromic in base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221533) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8719 + ... + 8857.

2^1221532 is an apocalyptic number.

It is an amenable number.

1221532 is a deficient number, since it is larger than the sum of its proper divisors (1110868).

1221532 is a wasteful number, since it uses less digits than its factorization.

1221532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 182 (or 154 counting only the distinct ones).

The product of its digits is 120, while the sum is 16.

The square root of 1221532 is about 1105.2293879553. The cubic root of 1221532 is about 106.8976807421.

Adding to 1221532 its reverse (2351221), we get a palindrome (3572753).

The spelling of 1221532 in words is "one million, two hundred twenty-one thousand, five hundred thirty-two".