4957861 has 4 divisors (see below), whose sum is σ = 5117824. Its totient is φ = 4797900.

The previous prime is 4957847. The next prime is 4957871. The reversal of 4957861 is 1687594.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1687594 = 2 ⋅843797.

It is a cyclic number.

It is not a de Polignac number, because 4957861 - 2⁹ = 4957349 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4957801) 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, 79935 + ... + 79996.

It is an arithmetic number, because the mean of its divisors is an integer number (1279456).

Almost surely, 2^4957861 is an apocalyptic number.

It is an amenable number.

4957861 is a deficient number, since it is larger than the sum of its proper divisors (159963).

4957861 is a wasteful number, since it uses less digits than its factorization.

4957861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159962.

The product of its digits is 60480, while the sum is 40.

The square root of 4957861 is about 2226.6254736709. The cubic root of 4957861 is about 170.5158609612.

The spelling of 4957861 in words is "four million, nine hundred fifty-seven thousand, eight hundred sixty-one".