145937549 has 4 divisors (see below), whose sum is σ = 146056764. Its totient is φ = 145818336.

The previous prime is 145937521. The next prime is 145937551. The reversal of 145937549 is 945739541.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 44129449 + 101808100 = 6643^2 + 10090^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-145937549 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 (145930549) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 57752 + ... + 60225.

It is an arithmetic number, because the mean of its divisors is an integer number (36514191).

Almost surely, 2^145937549 is an apocalyptic number.

It is an amenable number.

145937549 is a deficient number, since it is larger than the sum of its proper divisors (119215).

145937549 is a wasteful number, since it uses less digits than its factorization.

145937549 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119214.

The product of its digits is 680400, while the sum is 47.

The square root of 145937549 is about 12080.4614564180. The cubic root of 145937549 is about 526.4886534972.

The spelling of 145937549 in words is "one hundred forty-five million, nine hundred thirty-seven thousand, five hundred forty-nine".