402202145 has 4 divisors (see below), whose sum is σ = 482642580. Its totient is φ = 321761712.

The previous prime is 402202121. The next prime is 402202181. The reversal of 402202145 is 541202204.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 155052304 + 247149841 = 12452^2 + 15721^2 .

It is a cyclic number.

It is not a de Polignac number, because 402202145 - 2²⁴ = 385424929 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40220210 + ... + 40220219.

It is an arithmetic number, because the mean of its divisors is an integer number (120660645).

Almost surely, 2^402202145 is an apocalyptic number.

It is an amenable number.

402202145 is a deficient number, since it is larger than the sum of its proper divisors (80440435).

402202145 is an equidigital number, since it uses as much as digits as its factorization.

402202145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80440434.

The product of its (nonzero) digits is 640, while the sum is 20.

The square root of 402202145 is about 20054.9780603221. The cubic root of 402202145 is about 738.1559545610.

Adding to 402202145 its reverse (541202204), we get a palindrome (943404349).

The spelling of 402202145 in words is "four hundred two million, two hundred two thousand, one hundred forty-five".