145174447 has 8 divisors (see below), whose sum is σ = 158463360. Its totient is φ = 131900760.

The previous prime is 145174439. The next prime is 145174451. The reversal of 145174447 is 744471541.

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 145174447 - 2³ = 145174439 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145174487) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27054 + ... + 31972.

It is an arithmetic number, because the mean of its divisors is an integer number (19807920).

Almost surely, 2^145174447 is an apocalyptic number.

145174447 is the 9838-th pentagonal number.

145174447 is a deficient number, since it is larger than the sum of its proper divisors (13288913).

145174447 is a wasteful number, since it uses less digits than its factorization.

145174447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7613.

The product of its digits is 62720, while the sum is 37.

The square root of 145174447 is about 12048.8359188761. The cubic root of 145174447 is about 525.5693861822.

The spelling of 145174447 in words is "one hundred forty-five million, one hundred seventy-four thousand, four hundred forty-seven".