145049473 has 4 divisors (see below), whose sum is σ = 148135680. Its totient is φ = 141963268.

The previous prime is 145049453. The next prime is 145049479. The reversal of 145049473 is 374940541.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 374940541 = 3929 ⋅95429.

It is a cyclic number.

It is not a de Polignac number, because 145049473 - 2⁹ = 145048961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (145049479) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1543033 + ... + 1543126.

It is an arithmetic number, because the mean of its divisors is an integer number (37033920).

Almost surely, 2^145049473 is an apocalyptic number.

It is an amenable number.

145049473 is a deficient number, since it is larger than the sum of its proper divisors (3086207).

145049473 is an equidigital number, since it uses as much as digits as its factorization.

145049473 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3086206.

The product of its (nonzero) digits is 60480, while the sum is 37.

The square root of 145049473 is about 12043.6486581102. The cubic root of 145049473 is about 525.4185300535.

The spelling of 145049473 in words is "one hundred forty-five million, forty-nine thousand, four hundred seventy-three".