250521004642 has 4 divisors (see below), whose sum is σ = 375781506966. Its totient is φ = 125260502320.

The previous prime is 250521004637. The next prime is 250521004649. The reversal of 250521004642 is 246400125052.

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

It can be written as a sum of positive squares in only one way, i.e., 246155891881 + 4365112761 = 496141^2 + 66069^2 .

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (250521004649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62630251159 + ... + 62630251162.

Almost surely, 2^250521004642 is an apocalyptic number.

250521004642 is a deficient number, since it is larger than the sum of its proper divisors (125260502324).

250521004642 is a wasteful number, since it uses less digits than its factorization.

250521004642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125260502323.

The product of its (nonzero) digits is 19200, while the sum is 31.

Adding to 250521004642 its reverse (246400125052), we get a palindrome (496921129694).

The spelling of 250521004642 in words is "two hundred fifty billion, five hundred twenty-one million, four thousand, six hundred forty-two".