1243400499 has 12 divisors (see below), whose sum is σ = 1959297912. Its totient is φ = 753576000.

The previous prime is 1243400479. The next prime is 1243400531. The reversal of 1243400499 is 9940043421.

1243400499 is a `hidden beast` number, since 1 + 243 + 400 + 4 + 9 + 9 = 666.

It is not a de Polignac number, because 1243400499 - 2⁵ = 1243400467 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1243400479) 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, 6279702 + ... + 6279899.

It is an arithmetic number, because the mean of its divisors is an integer number (163274826).

Almost surely, 2^1243400499 is an apocalyptic number.

1243400499 is a deficient number, since it is larger than the sum of its proper divisors (715897413).

1243400499 is a wasteful number, since it uses less digits than its factorization.

1243400499 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12559618 (or 12559615 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 36.

The square root of 1243400499 is about 35261.8845072126. The cubic root of 1243400499 is about 1075.3182397263.

The spelling of 1243400499 in words is "one billion, two hundred forty-three million, four hundred thousand, four hundred ninety-nine".