145981445 has 8 divisors (see below), whose sum is σ = 175331736. Its totient is φ = 116682496.

The previous prime is 145981441. The next prime is 145981463. The reversal of 145981445 is 544189541.

It can be written as a sum of positive squares in 4 ways, for example, as 31427236 + 114554209 = 5606^2 + 10703^2 .

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 145981445 - 2² = 145981441 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145981441) 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, 6272 + ... + 18201.

It is an arithmetic number, because the mean of its divisors is an integer number (21916467).

Almost surely, 2^145981445 is an apocalyptic number.

It is an amenable number.

145981445 is a deficient number, since it is larger than the sum of its proper divisors (29350291).

145981445 is a wasteful number, since it uses less digits than its factorization.

145981445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25671.

The product of its digits is 115200, while the sum is 41.

The square root of 145981445 is about 12082.2781378348. The cubic root of 145981445 is about 526.5414350450.

The spelling of 145981445 in words is "one hundred forty-five million, nine hundred eighty-one thousand, four hundred forty-five".