100520642 has 4 divisors (see below), whose sum is σ = 150780966. Its totient is φ = 50260320.

The previous prime is 100520579. The next prime is 100520647. The reversal of 100520642 is 246025001.

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 only one way, i.e., 51394561 + 49126081 = 7169^2 + 7009^2 .

It is not an unprimeable number, because it can be changed into a prime (100520647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25130159 + ... + 25130162.

Almost surely, 2^100520642 is an apocalyptic number.

100520642 is a deficient number, since it is larger than the sum of its proper divisors (50260324).

100520642 is an equidigital number, since it uses as much as digits as its factorization.

100520642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50260323.

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 100520642 is about 10025.9983044084. The cubic root of 100520642 is about 464.9630247703.

Adding to 100520642 its reverse (246025001), we get a palindrome (346545643).

The spelling of 100520642 in words is "one hundred million, five hundred twenty thousand, six hundred forty-two".