202145407 has 2 divisors, whose sum is σ = 202145408. Its totient is φ = 202145406.

The previous prime is 202145371. The next prime is 202145429. The reversal of 202145407 is 704541202.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-202145407 is a prime.

It is a zygodrome in base 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (202145497) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101072703 + 101072704.

It is an arithmetic number, because the mean of its divisors is an integer number (101072704).

Almost surely, 2^202145407 is an apocalyptic number.

202145407 is a deficient number, since it is larger than the sum of its proper divisors (1).

202145407 is an equidigital number, since it uses as much as digits as its factorization.

202145407 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2240, while the sum is 25.

The square root of 202145407 is about 14217.7848837293. The cubic root of 202145407 is about 586.8871842684.

Adding to 202145407 its reverse (704541202), we get a palindrome (906686609).

The spelling of 202145407 in words is "two hundred two million, one hundred forty-five thousand, four hundred seven".