1221477 has 16 divisors (see below), whose sum is σ = 1697280. Its totient is φ = 780912.

The previous prime is 1221469. The next prime is 1221499. The reversal of 1221477 is 7741221.

It is not a de Polignac number, because 1221477 - 2³ = 1221469 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221427) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11808 + ... + 11910.

It is an arithmetic number, because the mean of its divisors is an integer number (106080).

2^1221477 is an apocalyptic number.

It is an amenable number.

1221477 is a deficient number, since it is larger than the sum of its proper divisors (475803).

1221477 is a wasteful number, since it uses less digits than its factorization.

1221477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 232.

The product of its digits is 784, while the sum is 24.

The square root of 1221477 is about 1105.2045059626. The cubic root of 1221477 is about 106.8960763468.

Adding to 1221477 its reverse (7741221), we get a palindrome (8962698).

The spelling of 1221477 in words is "one million, two hundred twenty-one thousand, four hundred seventy-seven".