400134425 has 6 divisors (see below), whose sum is σ = 496166718. Its totient is φ = 320107520.

The previous prime is 400134421. The next prime is 400134437. The reversal of 400134425 is 524431004.

It can be written as a sum of positive squares in 3 ways, for example, as 83685904 + 316448521 = 9148^2 + 17789^2 .

It is not a de Polignac number, because 400134425 - 2² = 400134421 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 400134425.

It is not an unprimeable number, because it can be changed into a prime (400134421) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8002664 + ... + 8002713.

It is an arithmetic number, because the mean of its divisors is an integer number (82694453).

Almost surely, 2^400134425 is an apocalyptic number.

It is an amenable number.

400134425 is a deficient number, since it is larger than the sum of its proper divisors (96032293).

400134425 is a wasteful number, since it uses less digits than its factorization.

400134425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16005387 (or 16005382 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 400134425 is about 20003.3603427024. The cubic root of 400134425 is about 736.8888281396. Note that the first 4 decimals are identical.

Adding to 400134425 its reverse (524431004), we get a palindrome (924565429).

The spelling of 400134425 in words is "four hundred million, one hundred thirty-four thousand, four hundred twenty-five".