145504133 has 4 divisors (see below), whose sum is σ = 148249548. Its totient is φ = 142758720.

The previous prime is 145504103. The next prime is 145504159. The reversal of 145504133 is 331405541.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 331405541 = 1553 ⋅213397.

It can be written as a sum of positive squares in 2 ways, for example, as 131836324 + 13667809 = 11482^2 + 3697^2 .

It is a cyclic number.

It is not a de Polignac number, because 145504133 - 2¹⁰ = 145503109 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 (145504103) 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, 1372628 + ... + 1372733.

It is an arithmetic number, because the mean of its divisors is an integer number (37062387).

Almost surely, 2^145504133 is an apocalyptic number.

It is an amenable number.

145504133 is a deficient number, since it is larger than the sum of its proper divisors (2745415).

145504133 is an equidigital number, since it uses as much as digits as its factorization.

145504133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2745414.

The product of its (nonzero) digits is 3600, while the sum is 26.

The square root of 145504133 is about 12062.5093989601. The cubic root of 145504133 is about 525.9669351815.

Adding to 145504133 its reverse (331405541), we get a palindrome (476909674).

The spelling of 145504133 in words is "one hundred forty-five million, five hundred four thousand, one hundred thirty-three".