400425145 has 4 divisors (see below), whose sum is σ = 480510180. Its totient is φ = 320340112.

The previous prime is 400425143. The next prime is 400425149. The reversal of 400425145 is 541524004.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 116704809 + 283720336 = 10803^2 + 16844^2 .

It is a cyclic number.

It is not a de Polignac number, because 400425145 - 2¹ = 400425143 is a prime.

It is not an unprimeable number, because it can be changed into a prime (400425143) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40042510 + ... + 40042519.

It is an arithmetic number, because the mean of its divisors is an integer number (120127545).

Almost surely, 2^400425145 is an apocalyptic number.

It is an amenable number.

400425145 is a deficient number, since it is larger than the sum of its proper divisors (80085035).

400425145 is an equidigital number, since it uses as much as digits as its factorization.

400425145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80085034.

The product of its (nonzero) digits is 3200, while the sum is 25.

The square root of 400425145 is about 20010.6258023081. The cubic root of 400425145 is about 737.0672485609.

Adding to 400425145 its reverse (541524004), we get a palindrome (941949149).

The spelling of 400425145 in words is "four hundred million, four hundred twenty-five thousand, one hundred forty-five".