145531454 has 8 divisors (see below), whose sum is σ = 225824760. Its totient is φ = 70256536.

The previous prime is 145531433. The next prime is 145531489. The reversal of 145531454 is 454135541.

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

It is a self number, because there is not a number n which added to its sum of digits gives 145531454.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1254524 + ... + 1254639.

It is an arithmetic number, because the mean of its divisors is an integer number (28228095).

Almost surely, 2^145531454 is an apocalyptic number.

145531454 is a deficient number, since it is larger than the sum of its proper divisors (80293306).

145531454 is a wasteful number, since it uses less digits than its factorization.

145531454 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2509194.

The product of its digits is 24000, while the sum is 32.

The square root of 145531454 is about 12063.6418216059. The cubic root of 145531454 is about 525.9998530170. Note that the first 3 decimals are identical.

Adding to 145531454 its reverse (454135541), we get a palindrome (599666995).

The spelling of 145531454 in words is "one hundred forty-five million, five hundred thirty-one thousand, four hundred fifty-four".