405325042 has 4 divisors (see below), whose sum is σ = 607987566. Its totient is φ = 202662520.

The previous prime is 405325007. The next prime is 405325087. The reversal of 405325042 is 240523504.

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., 238424481 + 166900561 = 15441^2 + 12919^2 .

It is a junction number, because it is equal to n+sod(n) for n = 405324998 and 405325016.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101331259 + ... + 101331262.

Almost surely, 2^405325042 is an apocalyptic number.

405325042 is a deficient number, since it is larger than the sum of its proper divisors (202662524).

405325042 is a wasteful number, since it uses less digits than its factorization.

405325042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 202662523.

The product of its (nonzero) digits is 4800, while the sum is 25.

The square root of 405325042 is about 20132.6859112241. The cubic root of 405325042 is about 740.0615008540.

Adding to 405325042 its reverse (240523504), we get a palindrome (645848546).

The spelling of 405325042 in words is "four hundred five million, three hundred twenty-five thousand, forty-two".