40425 has 36 divisors (see below), whose sum is σ = 84816. Its totient is φ = 16800.

The previous prime is 40423. The next prime is 40427. The reversal of 40425 is 52404.

40425 = 1² + 2² + ... + 49².

It is an interprime number because it is at equal distance from previous prime (40423) and next prime (40427).

It is not a de Polignac number, because 40425 - 2¹ = 40423 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is not an unprimeable number, because it can be changed into a prime (40423) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 3670 + ... + 3680.

It is an arithmetic number, because the mean of its divisors is an integer number (2356).

2⁴⁰⁴²⁵ is an apocalyptic number.

It is an amenable number.

40425 is an abundant number, since it is smaller than the sum of its proper divisors (44391).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

It is a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42408).

40425 is a wasteful number, since it uses less digits than its factorization.

40425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38 (or 26 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 15.

The square root of 40425 is about 201.0596926288. The cubic root of 40425 is about 34.3202157658.

Adding to 40425 its reverse (52404), we get a palindrome (92829).

It can be divided in two parts, 40 and 425, that added together give a triangular number (465 = T₃₀).

The spelling of 40425 in words is "forty thousand, four hundred twenty-five".