1221170 has 8 divisors (see below), whose sum is σ = 2198124. Its totient is φ = 488464.

The previous prime is 1221167. The next prime is 1221193. The reversal of 1221170 is 711221.

It can be written as a sum of positive squares in 2 ways, for example, as 1181569 + 39601 = 1087^2 + 199^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 61049 + ... + 61068.

2^1221170 is an apocalyptic number.

1221170 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1221170 is a deficient number, since it is larger than the sum of its proper divisors (976954).

1221170 is a wasteful number, since it uses less digits than its factorization.

1221170 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122124.

The product of its (nonzero) digits is 28, while the sum is 14.

The square root of 1221170 is about 1105.0656089120. The cubic root of 1221170 is about 106.8871200190.

Adding to 1221170 its reverse (711221), we get a palindrome (1932391).

The spelling of 1221170 in words is "one million, two hundred twenty-one thousand, one hundred seventy".