145481447 has 8 divisors (see below), whose sum is σ = 151095600. Its totient is φ = 139955904.

The previous prime is 145481437. The next prime is 145481471. The reversal of 145481447 is 744184541.

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

It is not a de Polignac number, because 145481447 - 2⁶ = 145481383 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 145481447.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145481437) 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, 18797 + ... + 25382.

It is an arithmetic number, because the mean of its divisors is an integer number (18886950).

Almost surely, 2^145481447 is an apocalyptic number.

145481447 is a deficient number, since it is larger than the sum of its proper divisors (5614153).

145481447 is an equidigital number, since it uses as much as digits as its factorization.

145481447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44305.

The product of its digits is 71680, while the sum is 38.

The square root of 145481447 is about 12061.5690107050. The cubic root of 145481447 is about 525.9395987162.

The spelling of 145481447 in words is "one hundred forty-five million, four hundred eighty-one thousand, four hundred forty-seven".