145844474 has 4 divisors (see below), whose sum is σ = 218766714. Its totient is φ = 72922236.

The previous prime is 145844471. The next prime is 145844539. The reversal of 145844474 is 474448541.

It is a happy number.

145844474 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in only one way, i.e., 134908225 + 10936249 = 11615^2 + 3307^2 .

It is a super-2 number, since 2×145844474² = 42541221192673352, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (145844471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36461117 + ... + 36461120.

Almost surely, 2^145844474 is an apocalyptic number.

145844474 is a deficient number, since it is larger than the sum of its proper divisors (72922240).

145844474 is an equidigital number, since it uses as much as digits as its factorization.

145844474 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72922239.

The product of its digits is 286720, while the sum is 41.

The square root of 145844474 is about 12076.6085471046. The cubic root of 145844474 is about 526.3767029790.

The spelling of 145844474 in words is "one hundred forty-five million, eight hundred forty-four thousand, four hundred seventy-four".