781241420 has 48 divisors (see below), whose sum is σ = 1679438880. Its totient is φ = 305170944.

The previous prime is 781241399. The next prime is 781241423. The reversal of 781241420 is 24142187.

It is a super-2 number, since 2×781241420² = 1220676312647232800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (781241423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 183152 + ... + 187368.

It is an arithmetic number, because the mean of its divisors is an integer number (34988310).

Almost surely, 2^781241420 is an apocalyptic number.

It is an amenable number.

781241420 is an abundant number, since it is smaller than the sum of its proper divisors (898197460).

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

781241420 is a wasteful number, since it uses less digits than its factorization.

781241420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4442 (or 4440 counting only the distinct ones).

The product of its (nonzero) digits is 3584, while the sum is 29.

The square root of 781241420 is about 27950.6962346200. The cubic root of 781241420 is about 921.0045030221.

The spelling of 781241420 in words is "seven hundred eighty-one million, two hundred forty-one thousand, four hundred twenty".