405007234 has 4 divisors (see below), whose sum is σ = 607510854. Its totient is φ = 202503616.

The previous prime is 405007223. The next prime is 405007237. The reversal of 405007234 is 432700504.

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

It can be written as a sum of positive squares in only one way, i.e., 257506209 + 147501025 = 16047^2 + 12145^2 .

It is a junction number, because it is equal to n+sod(n) for n = 405007199 and 405007208.

It is not an unprimeable number, because it can be changed into a prime (405007237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101251807 + ... + 101251810.

Almost surely, 2^405007234 is an apocalyptic number.

405007234 is a deficient number, since it is larger than the sum of its proper divisors (202503620).

405007234 is a wasteful number, since it uses less digits than its factorization.

405007234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202503619.

The product of its (nonzero) digits is 3360, while the sum is 25.

The square root of 405007234 is about 20124.7915268705. The cubic root of 405007234 is about 739.8680273539.

Adding to 405007234 its reverse (432700504), we get a palindrome (837707738).

The spelling of 405007234 in words is "four hundred five million, seven thousand, two hundred thirty-four".