104142640 has 120 divisors (see below), whose sum is σ = 291088512. Its totient is φ = 34513920.

The previous prime is 104142631. The next prime is 104142641. The reversal of 104142640 is 46241401.

It is not an unprimeable number, because it can be changed into a prime (104142641) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 121092 + ... + 121948.

Almost surely, 2^104142640 is an apocalyptic number.

104142640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 104142640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (145544256).

104142640 is an abundant number, since it is smaller than the sum of its proper divisors (186945872).

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

104142640 is a wasteful number, since it uses less digits than its factorization.

104142640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 915 (or 902 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 22.

The square root of 104142640 is about 10205.0301322436. The cubic root of 104142640 is about 470.4818357244.

It can be divided in two parts, 1041 and 42640, that added together give a square (43681 = 209²).

The spelling of 104142640 in words is "one hundred four million, one hundred forty-two thousand, six hundred forty".