1221499 has 2 divisors, whose sum is σ = 1221500. Its totient is φ = 1221498.

The previous prime is 1221469. The next prime is 1221503. The reversal of 1221499 is 9941221.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1221499 - 2¹⁵ = 1188731 is a prime.

It is not a weakly prime, because it can be changed into another prime (1221449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610749 + 610750.

It is an arithmetic number, because the mean of its divisors is an integer number (610750).

2^1221499 is an apocalyptic number.

1221499 is a deficient number, since it is larger than the sum of its proper divisors (1).

1221499 is an equidigital number, since it uses as much as digits as its factorization.

1221499 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1296, while the sum is 28.

The square root of 1221499 is about 1105.2144588269. The cubic root of 1221499 is about 106.8967181107.

The spelling of 1221499 in words is "one million, two hundred twenty-one thousand, four hundred ninety-nine".