202540642 has 16 divisors (see below), whose sum is σ = 308206080. Its totient is φ = 99814752.

The previous prime is 202540633. The next prime is 202540643. The reversal of 202540642 is 246045202.

It is not an unprimeable number, because it can be changed into a prime (202540643) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43734 + ... + 48142.

It is an arithmetic number, because the mean of its divisors is an integer number (19262880).

Almost surely, 2^202540642 is an apocalyptic number.

202540642 is a deficient number, since it is larger than the sum of its proper divisors (105665438).

202540642 is a wasteful number, since it uses less digits than its factorization.

202540642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4737.

The product of its (nonzero) digits is 3840, while the sum is 25.

The square root of 202540642 is about 14231.6774134323. The cubic root of 202540642 is about 587.2694294858.

Adding to 202540642 its reverse (246045202), we get a palindrome (448585844).

The spelling of 202540642 in words is "two hundred two million, five hundred forty thousand, six hundred forty-two".