145270123 has 4 divisors (see below), whose sum is σ = 149956288. Its totient is φ = 140583960.

The previous prime is 145270121. The next prime is 145270133. The reversal of 145270123 is 321072541.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 145270123 - 2¹ = 145270121 is a prime.

It is a super-2 number, since 2×145270123² = 42206817272870258, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (145270121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2343036 + ... + 2343097.

It is an arithmetic number, because the mean of its divisors is an integer number (37489072).

Almost surely, 2^145270123 is an apocalyptic number.

145270123 is a deficient number, since it is larger than the sum of its proper divisors (4686165).

145270123 is an equidigital number, since it uses as much as digits as its factorization.

145270123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4686164.

The product of its (nonzero) digits is 1680, while the sum is 25.

The square root of 145270123 is about 12052.8056069946. The cubic root of 145270123 is about 525.6848181910.

The spelling of 145270123 in words is "one hundred forty-five million, two hundred seventy thousand, one hundred twenty-three".