145451549 has 2 divisors, whose sum is σ = 145451550. Its totient is φ = 145451548.

The previous prime is 145451539. The next prime is 145451569. The reversal of 145451549 is 945154541.

145451549 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 100360324 + 45091225 = 10018^2 + 6715^2 .

It is an emirp because it is prime and its reverse (945154541) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 145451549 - 2²⁴ = 128674333 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (145451539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72725774 + 72725775.

It is an arithmetic number, because the mean of its divisors is an integer number (72725775).

Almost surely, 2^145451549 is an apocalyptic number.

It is an amenable number.

145451549 is a deficient number, since it is larger than the sum of its proper divisors (1).

145451549 is an equidigital number, since it uses as much as digits as its factorization.

145451549 is an evil number, because the sum of its binary digits is even.

The product of its digits is 72000, while the sum is 38.

The square root of 145451549 is about 12060.3295560279. The cubic root of 145451549 is about 525.9035675022.

The spelling of 145451549 in words is "one hundred forty-five million, four hundred fifty-one thousand, five hundred forty-nine".