451861 has 8 divisors (see below), whose sum is σ = 471744. Its totient is φ = 432480.

The previous prime is 451859. The next prime is 451873. The reversal of 451861 is 168154.

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

It is a cyclic number.

It is not a de Polignac number, because 451861 - 2¹ = 451859 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 (451831) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4170 + ... + 4276.

It is an arithmetic number, because the mean of its divisors is an integer number (58968).

2⁴⁵¹⁸⁶¹ is an apocalyptic number.

451861 is a gapful number since it is divisible by the number (41) formed by its first and last digit.

It is an amenable number.

451861 is a deficient number, since it is larger than the sum of its proper divisors (19883).

451861 is a wasteful number, since it uses less digits than its factorization.

451861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 251.

The product of its digits is 960, while the sum is 25.

The square root of 451861 is about 672.2060695947. The cubic root of 451861 is about 76.7364351246.

The spelling of 451861 in words is "four hundred fifty-one thousand, eight hundred sixty-one".