145289545 has 4 divisors (see below), whose sum is σ = 174347460. Its totient is φ = 116231632.

The previous prime is 145289539. The next prime is 145289581. The reversal of 145289545 is 545982541.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 545982541 = 13 ⋅41998657.

It can be written as a sum of positive squares in 2 ways, for example, as 31483321 + 113806224 = 5611^2 + 10668^2 .

It is a cyclic number.

It is not a de Polignac number, because 145289545 - 2³ = 145289537 is a prime.

It is a super-2 number, since 2×145289545² = 42218103772614050, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14528950 + ... + 14528959.

It is an arithmetic number, because the mean of its divisors is an integer number (43586865).

Almost surely, 2^145289545 is an apocalyptic number.

It is an amenable number.

145289545 is a deficient number, since it is larger than the sum of its proper divisors (29057915).

145289545 is an equidigital number, since it uses as much as digits as its factorization.

145289545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29057914.

The product of its digits is 288000, while the sum is 43.

The square root of 145289545 is about 12053.6112845902. The cubic root of 145289545 is about 525.7082444248.

The spelling of 145289545 in words is "one hundred forty-five million, two hundred eighty-nine thousand, five hundred forty-five".