1451281 has 4 divisors (see below), whose sum is σ = 1562932. Its totient is φ = 1339632.

The previous prime is 1451267. The next prime is 1451291. The reversal of 1451281 is 1821541.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 968256 + 483025 = 984^2 + 695^2 .

It is a cyclic number.

It is not a de Polignac number, because 1451281 - 2⁵ = 1451249 is a prime.

It is a super-2 number, since 2×1451281² = 4212433081922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1451291) 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, 55806 + ... + 55831.

It is an arithmetic number, because the mean of its divisors is an integer number (390733).

2^1451281 is an apocalyptic number.

It is an amenable number.

1451281 is a deficient number, since it is larger than the sum of its proper divisors (111651).

1451281 is a wasteful number, since it uses less digits than its factorization.

1451281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111650.

The product of its digits is 320, while the sum is 22.

The square root of 1451281 is about 1204.6912467516. The cubic root of 1451281 is about 113.2184408519.

It can be divided in two parts, 145 and 1281, that multiplied together give a triangular number (185745 = T₆₀₉).

The spelling of 1451281 in words is "one million, four hundred fifty-one thousand, two hundred eighty-one".