451642 has 4 divisors (see below), whose sum is σ = 677466. Its totient is φ = 225820.

The previous prime is 451637. The next prime is 451657. The reversal of 451642 is 246154.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 246154 = 2 ⋅123077.

It can be written as a sum of positive squares in only one way, i.e., 239121 + 212521 = 489^2 + 461^2 .

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an Ulam number.

It is a nialpdrome in base 14.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112909 + ... + 112912.

2⁴⁵¹⁶⁴² is an apocalyptic number.

451642 is a deficient number, since it is larger than the sum of its proper divisors (225824).

451642 is a wasteful number, since it uses less digits than its factorization.

451642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 225823.

The product of its digits is 960, while the sum is 22.

The square root of 451642 is about 672.0431533763. The cubic root of 451642 is about 76.7240360350.

Adding to 451642 its reverse (246154), we get a palindrome (697796).

The spelling of 451642 in words is "four hundred fifty-one thousand, six hundred forty-two".