1399451234 has 4 divisors (see below), whose sum is σ = 2099176854. Its totient is φ = 699725616.

The previous prime is 1399451233. The next prime is 1399451269. The reversal of 1399451234 is 4321549931.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 4321549931 = 59 ⋅73246609.

It can be written as a sum of positive squares in only one way, i.e., 1171350625 + 228100609 = 34225^2 + 15103^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1399451191 and 1399451200.

It is not an unprimeable number, because it can be changed into a prime (1399451233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 349862807 + ... + 349862810.

Almost surely, 2^1399451234 is an apocalyptic number.

1399451234 is a deficient number, since it is larger than the sum of its proper divisors (699725620).

1399451234 is an equidigital number, since it uses as much as digits as its factorization.

1399451234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 699725619.

The product of its digits is 116640, while the sum is 41.

The square root of 1399451234 is about 37409.2399548561. The cubic root of 1399451234 is about 1118.5427566803.

The spelling of 1399451234 in words is "one billion, three hundred ninety-nine million, four hundred fifty-one thousand, two hundred thirty-four".