1221354 has 12 divisors (see below), whose sum is σ = 2646306. Its totient is φ = 407112.

The previous prime is 1221299. The next prime is 1221373. The reversal of 1221354 is 4531221.

It can be written as a sum of positive squares in only one way, i.e., 893025 + 328329 = 945^2 + 573^2 .

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 67853 = 1221354 / (1 + 2 + 2 + 1 + 3 + 5 + 4).

It is an Ulam number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 33909 + ... + 33944.

2^1221354 is an apocalyptic number.

1221354 is an abundant number, since it is smaller than the sum of its proper divisors (1424952).

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

1221354 is a wasteful number, since it uses less digits than its factorization.

1221354 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67861 (or 67858 counting only the distinct ones).

The product of its digits is 240, while the sum is 18.

The square root of 1221354 is about 1105.1488587516. The cubic root of 1221354 is about 106.8924881611.

Adding to 1221354 its reverse (4531221), we get a palindrome (5752575).

It can be divided in two parts, 1221 and 354, that multiplied together give a palindrome (432234).

The spelling of 1221354 in words is "one million, two hundred twenty-one thousand, three hundred fifty-four".