145272237 has 12 divisors (see below), whose sum is σ = 212906400. Its totient is φ = 88043560.

The previous prime is 145272227. The next prime is 145272241. The reversal of 145272237 is 732272541.

145272237 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 145272237 - 2⁴ = 145272221 is a prime.

It is a super-2 number, since 2×145272237² = 42208045685968338, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a junction number, because it is equal to n+sod(n) for n = 145272198 and 145272207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145272217) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 199737 + ... + 200462.

It is an arithmetic number, because the mean of its divisors is an integer number (17742200).

Almost surely, 2^145272237 is an apocalyptic number.

It is an amenable number.

145272237 is a deficient number, since it is larger than the sum of its proper divisors (67634163).

145272237 is a wasteful number, since it uses less digits than its factorization.

145272237 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 400224 (or 400213 counting only the distinct ones).

The product of its digits is 23520, while the sum is 33.

The square root of 145272237 is about 12052.8933040992. The cubic root of 145272237 is about 525.6873681357.

The spelling of 145272237 in words is "one hundred forty-five million, two hundred seventy-two thousand, two hundred thirty-seven".