1122400399 has 4 divisors (see below), whose sum is σ = 1126452664. Its totient is φ = 1118348136.

The previous prime is 1122400393. The next prime is 1122400417. The reversal of 1122400399 is 9930042211.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1122400399 - 2¹¹ = 1122398351 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1122400399.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1122400393) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2025717 + ... + 2026270.

It is an arithmetic number, because the mean of its divisors is an integer number (281613166).

Almost surely, 2^1122400399 is an apocalyptic number.

1122400399 is a deficient number, since it is larger than the sum of its proper divisors (4052265).

1122400399 is an equidigital number, since it uses as much as digits as its factorization.

1122400399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4052264.

The product of its (nonzero) digits is 3888, while the sum is 31.

The square root of 1122400399 is about 33502.2446859908. The cubic root of 1122400399 is about 1039.2401991713.

The spelling of 1122400399 in words is "one billion, one hundred twenty-two million, four hundred thousand, three hundred ninety-nine".