145505253 has 8 divisors (see below), whose sum is σ = 194241600. Its totient is φ = 96886208.

The previous prime is 145505231. The next prime is 145505257. The reversal of 145505253 is 352505541.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 145505253 - 2⁵ = 145505221 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 145505253.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145505257) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26388 + ... + 31421.

It is an arithmetic number, because the mean of its divisors is an integer number (24280200).

Almost surely, 2^145505253 is an apocalyptic number.

It is an amenable number.

145505253 is a deficient number, since it is larger than the sum of its proper divisors (48736347).

145505253 is an equidigital number, since it uses as much as digits as its factorization.

145505253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58651.

The product of its (nonzero) digits is 15000, while the sum is 30.

The square root of 145505253 is about 12062.5558237050. Note that the first 3 decimals coincide. The cubic root of 145505253 is about 525.9682846998.

The spelling of 145505253 in words is "one hundred forty-five million, five hundred five thousand, two hundred fifty-three".