400425135 has 16 divisors (see below), whose sum is σ = 698924160. Its totient is φ = 194145440.

The previous prime is 400425131. The next prime is 400425139. The reversal of 400425135 is 531524004.

It is an interprime number because it is at equal distance from previous prime (400425131) and next prime (400425139).

It is not a de Polignac number, because 400425135 - 2² = 400425131 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400425131) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1213245 + ... + 1213574.

It is an arithmetic number, because the mean of its divisors is an integer number (43682760).

Almost surely, 2^400425135 is an apocalyptic number.

400425135 is a deficient number, since it is larger than the sum of its proper divisors (298499025).

400425135 is a wasteful number, since it uses less digits than its factorization.

400425135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2426838.

The product of its (nonzero) digits is 2400, while the sum is 24.

The square root of 400425135 is about 20010.6255524409. The cubic root of 400425135 is about 737.0672424252.

Adding to 400425135 its reverse (531524004), we get a palindrome (931949139).

The spelling of 400425135 in words is "four hundred million, four hundred twenty-five thousand, one hundred thirty-five".