100142540 has 24 divisors (see below), whose sum is σ = 221368560. Its totient is φ = 37948608.

The previous prime is 100142531. The next prime is 100142543. The reversal of 100142540 is 45241001.

It is not an unprimeable number, because it can be changed into a prime (100142543) 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, 131387 + ... + 132146.

It is an arithmetic number, because the mean of its divisors is an integer number (9223690).

Almost surely, 2^100142540 is an apocalyptic number.

100142540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

100142540 is an abundant number, since it is smaller than the sum of its proper divisors (121226020).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

100142540 is a wasteful number, since it uses less digits than its factorization.

100142540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 263561 (or 263559 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 17.

The square root of 100142540 is about 10007.1244621020. The cubic root of 100142540 is about 464.3793160170.

Adding to 100142540 its reverse (45241001), we get a palindrome (145383541).

The spelling of 100142540 in words is "one hundred million, one hundred forty-two thousand, five hundred forty".