145452581 has 8 divisors (see below), whose sum is σ = 153222720. Its totient is φ = 137693952.

The previous prime is 145452577. The next prime is 145452599. The reversal of 145452581 is 185254541.

145452581 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 145452581 - 2² = 145452577 is a prime.

It is a super-2 number, since 2×145452581² = 42312906639123122, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145452521) 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, 38336 + ... + 41958.

It is an arithmetic number, because the mean of its divisors is an integer number (19152840).

Almost surely, 2^145452581 is an apocalyptic number.

It is an amenable number.

145452581 is a deficient number, since it is larger than the sum of its proper divisors (7770139).

145452581 is a wasteful number, since it uses less digits than its factorization.

145452581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5755.

The product of its digits is 32000, while the sum is 35.

The square root of 145452581 is about 12060.3723408525. The cubic root of 145452581 is about 525.9048112868.

The spelling of 145452581 in words is "one hundred forty-five million, four hundred fifty-two thousand, five hundred eighty-one".