145171438 has 16 divisors (see below), whose sum is σ = 234097920. Its totient is φ = 67301496.

The previous prime is 145171421. The next prime is 145171451. The reversal of 145171438 is 834171541.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38856 + ... + 42427.

It is an arithmetic number, because the mean of its divisors is an integer number (14631120).

Almost surely, 2^145171438 is an apocalyptic number.

145171438 is a deficient number, since it is larger than the sum of its proper divisors (88926482).

145171438 is a wasteful number, since it uses less digits than its factorization.

145171438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81351.

The product of its digits is 13440, while the sum is 34.

The square root of 145171438 is about 12048.7110513947. The cubic root of 145171438 is about 525.5657550354.

The spelling of 145171438 in words is "one hundred forty-five million, one hundred seventy-one thousand, four hundred thirty-eight".