145201921287 has 24 divisors (see below), whose sum is σ = 205837909200. Its totient is φ = 90937195776.

The previous prime is 145201921261. The next prime is 145201921297. The reversal of 145201921287 is 782129102541.

It is not a de Polignac number, because 145201921287 - 2¹² = 145201917191 is a prime.

It is a super-2 number, since 2×145201921287² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145201921217) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 490462 + ... + 728667.

It is an arithmetic number, because the mean of its divisors is an integer number (8576579550).

Almost surely, 2^145201921287 is an apocalyptic number.

145201921287 is a deficient number, since it is larger than the sum of its proper divisors (60635987913).

145201921287 is a wasteful number, since it uses less digits than its factorization.

145201921287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1219235 (or 1219198 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 42.

The spelling of 145201921287 in words is "one hundred forty-five billion, two hundred one million, nine hundred twenty-one thousand, two hundred eighty-seven".