403725 has 24 divisors (see below), whose sum is σ = 763840. Its totient is φ = 184320.

The previous prime is 403721. The next prime is 403729. The reversal of 403725 is 527304.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (403721) and next prime (403729).

It is not a de Polignac number, because 403725 - 2² = 403721 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

403725 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (403721) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 141 + ... + 909.

2⁴⁰³⁷²⁵ is an apocalyptic number.

It is an amenable number.

403725 is a deficient number, since it is larger than the sum of its proper divisors (360115).

403725 is a wasteful number, since it uses less digits than its factorization.

403725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 789 (or 784 counting only the distinct ones).

The product of its (nonzero) digits is 840, while the sum is 21.

The square root of 403725 is about 635.3935788155. The cubic root of 403725 is about 73.9086406033.

It can be divided in two parts, 403 and 725, that added together give a triangular number (1128 = T₄₇).

The spelling of 403725 in words is "four hundred three thousand, seven hundred twenty-five".