10402506 has 40 divisors (see below), whose sum is σ = 23515140. Its totient is φ = 3436992.

The previous prime is 10402501. The next prime is 10402523. The reversal of 10402506 is 60520401.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 10208025 + 194481 = 3195^2 + 441^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (10402501) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 25230 + ... + 25638.

Almost surely, 2^10402506 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 10402506, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11757570).

10402506 is an abundant number, since it is smaller than the sum of its proper divisors (13112634).

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

10402506 is a wasteful number, since it uses less digits than its factorization.

10402506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 580 (or 571 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 10402506 is about 3225.2916147226. The cubic root of 10402506 is about 218.2961074514.

Adding to 10402506 its reverse (60520401), we get a palindrome (70922907).

The spelling of 10402506 in words is "ten million, four hundred two thousand, five hundred six".