145061213 has 6 divisors (see below), whose sum is σ = 159447582. Its totient is φ = 131873720.

The previous prime is 145061197. The next prime is 145061227. The reversal of 145061213 is 312160541.

It can be written as a sum of positive squares in only one way, i.e., 139310809 + 5750404 = 11803^2 + 2398^2 .

It is not a de Polignac number, because 145061213 - 2⁴ = 145061197 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 (145061513) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 599306 + ... + 599547.

It is an arithmetic number, because the mean of its divisors is an integer number (26574597).

Almost surely, 2^145061213 is an apocalyptic number.

It is an amenable number.

145061213 is a deficient number, since it is larger than the sum of its proper divisors (14386369).

145061213 is a wasteful number, since it uses less digits than its factorization.

145061213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1198875 (or 1198864 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 145061213 is about 12044.1360420746. The cubic root of 145061213 is about 525.4327050956.

The spelling of 145061213 in words is "one hundred forty-five million, sixty-one thousand, two hundred thirteen".