1221254342 has 48 divisors (see below), whose sum is σ = 2329134912. Its totient is φ = 474904080.

The previous prime is 1221254339. The next prime is 1221254357. The reversal of 1221254342 is 2434521221.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 951233 + ... + 952515.

It is an arithmetic number, because the mean of its divisors is an integer number (48523644).

Almost surely, 2^1221254342 is an apocalyptic number.

1221254342 is a deficient number, since it is larger than the sum of its proper divisors (1107880570).

1221254342 is a wasteful number, since it uses less digits than its factorization.

1221254342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2193 (or 2186 counting only the distinct ones).

The product of its digits is 3840, while the sum is 26.

The square root of 1221254342 is about 34946.4496336895. The cubic root of 1221254342 is about 1068.8958073723.

Adding to 1221254342 its reverse (2434521221), we get a palindrome (3655775563).

The spelling of 1221254342 in words is "one billion, two hundred twenty-one million, two hundred fifty-four thousand, three hundred forty-two".