145073749 has 8 divisors (see below), whose sum is σ = 147397952. Its totient is φ = 142767360.

The previous prime is 145073711. The next prime is 145073779. The reversal of 145073749 is 947370541.

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 145073749 - 2⁹ = 145073237 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 (145073779) 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 7 ways as a sum of consecutive naturals, for example, 12469 + ... + 21109.

It is an arithmetic number, because the mean of its divisors is an integer number (18424744).

Almost surely, 2^145073749 is an apocalyptic number.

It is an amenable number.

145073749 is a deficient number, since it is larger than the sum of its proper divisors (2324203).

145073749 is a wasteful number, since it uses less digits than its factorization.

145073749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8907.

The product of its (nonzero) digits is 105840, while the sum is 40.

The square root of 145073749 is about 12044.6564500612. The cubic root of 145073749 is about 525.4478403950.

The spelling of 145073749 in words is "one hundred forty-five million, seventy-three thousand, seven hundred forty-nine".