47251420 has 12 divisors (see below), whose sum is σ = 99228024. Its totient is φ = 18900560.

The previous prime is 47251387. The next prime is 47251427. The reversal of 47251420 is 2415274.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47251427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1181266 + ... + 1181305.

It is an arithmetic number, because the mean of its divisors is an integer number (8269002).

Almost surely, 2^47251420 is an apocalyptic number.

It is an amenable number.

47251420 is an abundant number, since it is smaller than the sum of its proper divisors (51976604).

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

47251420 is a wasteful number, since it uses less digits than its factorization.

47251420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2362580 (or 2362578 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 25.

The square root of 47251420 is about 6873.9668314591. The cubic root of 47251420 is about 361.5249611794.

Adding to 47251420 its reverse (2415274), we get a palindrome (49666694).

The spelling of 47251420 in words is "forty-seven million, two hundred fifty-one thousand, four hundred twenty".