403121106 has 12 divisors (see below), whose sum is σ = 873429102. Its totient is φ = 134373696.

The previous prime is 403121101. The next prime is 403121107. The reversal of 403121106 is 601121304.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 397404225 + 5716881 = 19935^2 + 2391^2 .

It is a super-2 number, since 2×403121106² = 325013252205326472, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 22395617 = 403121106 / (4 + 0 + 3 + 1 + 2 + 1 + 1 + 0 + 6).

It is not an unprimeable number, because it can be changed into a prime (403121101) 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, 11197791 + ... + 11197826.

Almost surely, 2^403121106 is an apocalyptic number.

403121106 is an abundant number, since it is smaller than the sum of its proper divisors (470307996).

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

403121106 is a wasteful number, since it uses less digits than its factorization.

403121106 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22395625 (or 22395622 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 403121106 is about 20077.8760330868. The cubic root of 403121106 is about 738.7177123494.

The spelling of 403121106 in words is "four hundred three million, one hundred twenty-one thousand, one hundred six".