1221546 has 8 divisors (see below), whose sum is σ = 2443104. Its totient is φ = 407180.

The previous prime is 1221541. The next prime is 1221551. The reversal of 1221546 is 6451221.

It is an interprime number because it is at equal distance from previous prime (1221541) and next prime (1221551).

It is a sphenic number, since it is the product of 3 distinct primes.

1221546 is an admirable number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1221541) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 101790 + ... + 101801.

It is an arithmetic number, because the mean of its divisors is an integer number (305388).

2^1221546 is an apocalyptic number.

1221546 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1221546 is a wasteful number, since it uses less digits than its factorization.

1221546 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 203596.

The product of its digits is 480, while the sum is 21.

The square root of 1221546 is about 1105.2357214640. The cubic root of 1221546 is about 106.8980891259.

Adding to 1221546 its reverse (6451221), we get a palindrome (7672767).

It can be divided in two parts, 1221 and 546, that multiplied together give a palindrome (666666).

The spelling of 1221546 in words is "one million, two hundred twenty-one thousand, five hundred forty-six".