145808434 has 4 divisors (see below), whose sum is σ = 218712654. Its totient is φ = 72904216.

The previous prime is 145808419. The next prime is 145808447. The reversal of 145808434 is 434808541.

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., 145805625 + 2809 = 12075^2 + 53^2 .

It is a junction number, because it is equal to n+sod(n) for n = 145808393 and 145808402.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36452107 + ... + 36452110.

Almost surely, 2^145808434 is an apocalyptic number.

145808434 is a deficient number, since it is larger than the sum of its proper divisors (72904220).

145808434 is an equidigital number, since it uses as much as digits as its factorization.

145808434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72904219.

The product of its (nonzero) digits is 61440, while the sum is 37.

The square root of 145808434 is about 12075.1163141396. The cubic root of 145808434 is about 526.3333413105. Note that the first 4 decimals are identical.

The spelling of 145808434 in words is "one hundred forty-five million, eight hundred eight thousand, four hundred thirty-four".