1145451 has 4 divisors (see below), whose sum is σ = 1527272. Its totient is φ = 763632.

The previous prime is 1145429. The next prime is 1145461. The reversal of 1145451 is 1545411.

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

It is not a de Polignac number, because 1145451 - 2⁶ = 1145387 is a prime.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1145411) 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, 190906 + ... + 190911.

It is an arithmetic number, because the mean of its divisors is an integer number (381818).

2^1145451 is an apocalyptic number.

1145451 is a deficient number, since it is larger than the sum of its proper divisors (381821).

1145451 is an equidigital number, since it uses as much as digits as its factorization.

1145451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 381820.

The product of its digits is 400, while the sum is 21.

The square root of 1145451 is about 1070.2574456644. The cubic root of 1145451 is about 104.6306295851.

It can be divided in two parts, 1145 and 451, that added together give a triangular number (1596 = T₅₆).

The spelling of 1145451 in words is "one million, one hundred forty-five thousand, four hundred fifty-one".