202145406 has 32 divisors (see below), whose sum is σ = 408114720. Its totient is φ = 66748416.

The previous prime is 202145371. The next prime is 202145407. The reversal of 202145406 is 604541202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202145407) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 519460 + ... + 519848.

It is an arithmetic number, because the mean of its divisors is an integer number (12753585).

Almost surely, 2^202145406 is an apocalyptic number.

202145406 is an abundant number, since it is smaller than the sum of its proper divisors (205969314).

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

202145406 is a wasteful number, since it uses less digits than its factorization.

202145406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 988.

The product of its (nonzero) digits is 1920, while the sum is 24.

The square root of 202145406 is about 14217.7848485620. The cubic root of 202145406 is about 586.8871833006.

Adding to 202145406 its reverse (604541202), we get a palindrome (806686608).

The spelling of 202145406 in words is "two hundred two million, one hundred forty-five thousand, four hundred six".