145555738 has 16 divisors (see below), whose sum is σ = 221045760. Its totient is φ = 71878176.

The previous prime is 145555733. The next prime is 145555747. The reversal of 145555738 is 837555541.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 145555694 and 145555703.

It is not an unprimeable number, because it can be changed into a prime (145555733) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 86695 + ... + 88357.

It is an arithmetic number, because the mean of its divisors is an integer number (13815360).

Almost surely, 2^145555738 is an apocalyptic number.

145555738 is a deficient number, since it is larger than the sum of its proper divisors (75490022).

145555738 is a wasteful number, since it uses less digits than its factorization.

145555738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2181.

The product of its digits is 420000, while the sum is 43.

The square root of 145555738 is about 12064.6482750224. The cubic root of 145555738 is about 526.0291082505.

The spelling of 145555738 in words is "one hundred forty-five million, five hundred fifty-five thousand, seven hundred thirty-eight".