2457861 has 8 divisors (see below), whose sum is σ = 3745344. Its totient is φ = 1404480.

The previous prime is 2457839. The next prime is 2457869. The reversal of 2457861 is 1687542.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2457861 - 2⁶ = 2457797 is a prime.

It is a d-powerful number, because it can be written as 2¹¹ + 4⁴ + 5⁷ + 7³ + 8⁷ + 6⁷ + 1 .

2457861 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2457869) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 58500 + ... + 58541.

It is an arithmetic number, because the mean of its divisors is an integer number (468168).

2^2457861 is an apocalyptic number.

2457861 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2457861 is a deficient number, since it is larger than the sum of its proper divisors (1287483).

2457861 is a wasteful number, since it uses less digits than its factorization.

2457861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117051.

The product of its digits is 13440, while the sum is 33.

The square root of 2457861 is about 1567.7566775492. The cubic root of 2457861 is about 134.9540035345.

The spelling of 2457861 in words is "two million, four hundred fifty-seven thousand, eight hundred sixty-one".