145398243 has 8 divisors (see below), whose sum is σ = 197150400. Its totient is φ = 95289128.

The previous prime is 145398191. The next prime is 145398251. The reversal of 145398243 is 342893541.

145398243 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 145398243 - 2⁹ = 145397731 is a prime.

It is a super-2 number, since 2×145398243² = 42281298134974098, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (145398443) 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, 410553 + ... + 410906.

It is an arithmetic number, because the mean of its divisors is an integer number (24643800).

Almost surely, 2^145398243 is an apocalyptic number.

145398243 is a deficient number, since it is larger than the sum of its proper divisors (51752157).

145398243 is an equidigital number, since it uses as much as digits as its factorization.

145398243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 821521.

The product of its digits is 103680, while the sum is 39.

The square root of 145398243 is about 12058.1193807326. The cubic root of 145398243 is about 525.8393141681.

The spelling of 145398243 in words is "one hundred forty-five million, three hundred ninety-eight thousand, two hundred forty-three".