145452145 has 4 divisors (see below), whose sum is σ = 174542580. Its totient is φ = 116361712.

The previous prime is 145452137. The next prime is 145452149. The reversal of 145452145 is 541254541.

It is a happy number.

145452145 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 541254541 = 431 ⋅1255811.

It can be written as a sum of positive squares in 2 ways, for example, as 83247376 + 62204769 = 9124^2 + 7887^2 .

It is a cyclic number.

It is not a de Polignac number, because 145452145 - 2³ = 145452137 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is not an unprimeable number, because it can be changed into a prime (145452149) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14545210 + ... + 14545219.

It is an arithmetic number, because the mean of its divisors is an integer number (43635645).

Almost surely, 2^145452145 is an apocalyptic number.

It is an amenable number.

145452145 is a deficient number, since it is larger than the sum of its proper divisors (29090435).

145452145 is an equidigital number, since it uses as much as digits as its factorization.

145452145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29090434.

The product of its digits is 16000, while the sum is 31.

The square root of 145452145 is about 12060.3542651118. The cubic root of 145452145 is about 525.9042858126.

The spelling of 145452145 in words is "one hundred forty-five million, four hundred fifty-two thousand, one hundred forty-five".