145674781 has 8 divisors (see below), whose sum is σ = 166558784. Its totient is φ = 124809120.

The previous prime is 145674733. The next prime is 145674787. The reversal of 145674781 is 187476541.

145674781 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 a de Polignac number, because none of the positive numbers 2^k-145674781 is a prime.

It is a super-2 number, since 2×145674781² = 42442283638795922, which contains 22 as substring.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145674787) 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, 26566 + ... + 31576.

It is an arithmetic number, because the mean of its divisors is an integer number (20819848).

Almost surely, 2^145674781 is an apocalyptic number.

It is an amenable number.

145674781 is a deficient number, since it is larger than the sum of its proper divisors (20884003).

145674781 is an equidigital number, since it uses as much as digits as its factorization.

145674781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9171.

The product of its digits is 188160, while the sum is 43.

The square root of 145674781 is about 12069.5808129363. The cubic root of 145674781 is about 526.1724737645.

The spelling of 145674781 in words is "one hundred forty-five million, six hundred seventy-four thousand, seven hundred eighty-one".