1221546134 has 16 divisors (see below), whose sum is σ = 1895325696. Its totient is φ = 589852200.

The previous prime is 1221546127. The next prime is 1221546163. The reversal of 1221546134 is 4316451221.

It is a junction number, because it is equal to n+sod(n) for n = 1221546097 and 1221546106.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10379 + ... + 50505.

It is an arithmetic number, because the mean of its divisors is an integer number (118457856).

Almost surely, 2^1221546134 is an apocalyptic number.

1221546134 is a deficient number, since it is larger than the sum of its proper divisors (673779562).

1221546134 is a wasteful number, since it uses less digits than its factorization.

1221546134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40651.

The product of its digits is 5760, while the sum is 29.

The square root of 1221546134 is about 34950.6242290463. The cubic root of 1221546134 is about 1068.9809303473.

Adding to 1221546134 its reverse (4316451221), we get a palindrome (5537997355).

The spelling of 1221546134 in words is "one billion, two hundred twenty-one million, five hundred forty-six thousand, one hundred thirty-four".