403134021 has 12 divisors (see below), whose sum is σ = 582555948. Its totient is φ = 268640064.

The previous prime is 403134019. The next prime is 403134049. The reversal of 403134021 is 120431304.

It can be written as a sum of positive squares in 2 ways, for example, as 106812225 + 296321796 = 10335^2 + 17214^2 .

It is not a de Polignac number, because 403134021 - 2¹ = 403134019 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 403133985 and 403134003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (403134091) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15921 + ... + 32553.

It is an arithmetic number, because the mean of its divisors is an integer number (48546329).

Almost surely, 2^403134021 is an apocalyptic number.

It is an amenable number.

403134021 is a deficient number, since it is larger than the sum of its proper divisors (179421927).

403134021 is a wasteful number, since it uses less digits than its factorization.

403134021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19332 (or 19329 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 403134021 is about 20078.1976531759. The cubic root of 403134021 is about 738.7256011594.

Adding to 403134021 its reverse (120431304), we get a palindrome (523565325).

The spelling of 403134021 in words is "four hundred three million, one hundred thirty-four thousand, twenty-one".