145121250209 has 8 divisors (see below), whose sum is σ = 156299512320. Its totient is φ = 133945143696.

The previous prime is 145121250191. The next prime is 145121250217. The reversal of 145121250209 is 902052121541.

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

It is not a de Polignac number, because 145121250209 - 2⁸ = 145121249953 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (145121250709) 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, 397697 + ... + 669630.

It is an arithmetic number, because the mean of its divisors is an integer number (19537439040).

Almost surely, 2^145121250209 is an apocalyptic number.

It is an amenable number.

145121250209 is a deficient number, since it is larger than the sum of its proper divisors (11178262111).

145121250209 is a wasteful number, since it uses less digits than its factorization.

145121250209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1077799.

The product of its (nonzero) digits is 7200, while the sum is 32.

The spelling of 145121250209 in words is "one hundred forty-five billion, one hundred twenty-one million, two hundred fifty thousand, two hundred nine".