400425505 has 8 divisors (see below), whose sum is σ = 480753792. Its totient is φ = 320178288.

The previous prime is 400425479. The next prime is 400425527. The reversal of 400425505 is 505524004.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 400425505 - 2¹³ = 400417313 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 400425505.

It is an unprimeable number.

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 in 7 ways as a sum of consecutive naturals, for example, 8809 + ... + 29638.

It is an arithmetic number, because the mean of its divisors is an integer number (60094224).

Almost surely, 2^400425505 is an apocalyptic number.

It is an amenable number.

400425505 is a deficient number, since it is larger than the sum of its proper divisors (80328287).

400425505 is a wasteful number, since it uses less digits than its factorization.

400425505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40535.

The product of its (nonzero) digits is 4000, while the sum is 25.

The square root of 400425505 is about 20010.6347975270. The cubic root of 400425505 is about 737.0674694462.

Adding to 400425505 its reverse (505524004), we get a palindrome (905949509).

The spelling of 400425505 in words is "four hundred million, four hundred twenty-five thousand, five hundred five".