145842478 has 4 divisors (see below), whose sum is σ = 218763720. Its totient is φ = 72921238.

The previous prime is 145842467. The next prime is 145842503. The reversal of 145842478 is 874248541.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 874248541 = 1609 ⋅543349.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36460618 + ... + 36460621.

It is an arithmetic number, because the mean of its divisors is an integer number (54690930).

Almost surely, 2^145842478 is an apocalyptic number.

145842478 is a deficient number, since it is larger than the sum of its proper divisors (72921242).

145842478 is an equidigital number, since it uses as much as digits as its factorization.

145842478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72921241.

The product of its digits is 286720, while the sum is 43.

The square root of 145842478 is about 12076.5259077269. The cubic root of 145842478 is about 526.3743016706.

The spelling of 145842478 in words is "one hundred forty-five million, eight hundred forty-two thousand, four hundred seventy-eight".