47025721 has 2 divisors, whose sum is σ = 47025722. Its totient is φ = 47025720.

The previous prime is 47025707. The next prime is 47025743. The reversal of 47025721 is 12752074.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27709696 + 19316025 = 5264^2 + 4395^2 .

It is a cyclic number.

It is not a de Polignac number, because 47025721 - 2²³ = 38637113 is a prime.

It is a super-2 number, since 2×47025721² = 4422836871139682, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 47025721.

It is not a weakly prime, because it can be changed into another prime (47025221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23512860 + 23512861.

It is an arithmetic number, because the mean of its divisors is an integer number (23512861).

Almost surely, 2^47025721 is an apocalyptic number.

It is an amenable number.

47025721 is a deficient number, since it is larger than the sum of its proper divisors (1).

47025721 is an equidigital number, since it uses as much as digits as its factorization.

47025721 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3920, while the sum is 28.

The square root of 47025721 is about 6857.5302405458. The cubic root of 47025721 is about 360.9484276509.

Adding to 47025721 its reverse (12752074), we get a palindrome (59777795).

The spelling of 47025721 in words is "forty-seven million, twenty-five thousand, seven hundred twenty-one".