4951681 has 4 divisors (see below), whose sum is σ = 5659072. Its totient is φ = 4244292.

The previous prime is 4951679. The next prime is 4951691. The reversal of 4951681 is 1861594.

4951681 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 4951681 - 2¹ = 4951679 is a prime.

It is a super-2 number, since 2×4951681² = 49038289451522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4951621) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 353685 + ... + 353698.

It is an arithmetic number, because the mean of its divisors is an integer number (1414768).

Almost surely, 2^4951681 is an apocalyptic number.

It is an amenable number.

4951681 is a deficient number, since it is larger than the sum of its proper divisors (707391).

4951681 is an equidigital number, since it uses as much as digits as its factorization.

4951681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 707390.

The product of its digits is 8640, while the sum is 34.

The square root of 4951681 is about 2225.2372907176. The cubic root of 4951681 is about 170.4449818613. Note that the first 3 decimals are identical.

The spelling of 4951681 in words is "four million, nine hundred fifty-one thousand, six hundred eighty-one".