145840553 has 2 divisors, whose sum is σ = 145840554. Its totient is φ = 145840552.

The previous prime is 145840543. The next prime is 145840559. The reversal of 145840553 is 355048541.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 139901584 + 5938969 = 11828^2 + 2437^2 .

It is an emirp because it is prime and its reverse (355048541) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 145840553 - 2²⁶ = 78731689 is a prime.

It is not a weakly prime, because it can be changed into another prime (145840559) 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 as a sum of consecutive naturals, namely, 72920276 + 72920277.

It is an arithmetic number, because the mean of its divisors is an integer number (72920277).

Almost surely, 2^145840553 is an apocalyptic number.

It is an amenable number.

145840553 is a deficient number, since it is larger than the sum of its proper divisors (1).

145840553 is an equidigital number, since it uses as much as digits as its factorization.

145840553 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48000, while the sum is 35.

The square root of 145840553 is about 12076.4462073906. The cubic root of 145840553 is about 526.3719857587.

The spelling of 145840553 in words is "one hundred forty-five million, eight hundred forty thousand, five hundred fifty-three".