1212399 has 12 divisors (see below), whose sum is σ = 1827696. Its totient is φ = 772992.

The previous prime is 1212397. The next prime is 1212401. The reversal of 1212399 is 9932121.

It is an interprime number because it is at equal distance from previous prime (1212397) and next prime (1212401).

It is not a de Polignac number, because 1212399 - 2¹ = 1212397 is a prime.

It is a super-2 number, since 2×1212399² = 2939822670402, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212397) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2722 + ... + 3135.

It is an arithmetic number, because the mean of its divisors is an integer number (152308).

2^1212399 is an apocalyptic number.

1212399 is a deficient number, since it is larger than the sum of its proper divisors (615297).

1212399 is a wasteful number, since it uses less digits than its factorization.

1212399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5886 (or 5883 counting only the distinct ones).

The product of its digits is 972, while the sum is 27.

The square root of 1212399 is about 1101.0899145846. The cubic root of 1212399 is about 106.6306008712.

The spelling of 1212399 in words is "one million, two hundred twelve thousand, three hundred ninety-nine".