75420140 has 12 divisors (see below), whose sum is σ = 158382336. Its totient is φ = 30168048.

The previous prime is 75420133. The next prime is 75420187. The reversal of 75420140 is 4102457.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1885484 + ... + 1885523.

It is an arithmetic number, because the mean of its divisors is an integer number (13198528).

Almost surely, 2^75420140 is an apocalyptic number.

It is an amenable number.

75420140 is an abundant number, since it is smaller than the sum of its proper divisors (82962196).

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

75420140 is a wasteful number, since it uses less digits than its factorization.

75420140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3771016 (or 3771014 counting only the distinct ones).

The product of its (nonzero) digits is 1120, while the sum is 23.

The square root of 75420140 is about 8684.4769560406. The cubic root of 75420140 is about 422.5023330053.

Adding to 75420140 its reverse (4102457), we get a palindrome (79522597).

The spelling of 75420140 in words is "seventy-five million, four hundred twenty thousand, one hundred forty".