145506855 has 32 divisors (see below), whose sum is σ = 261628416. Its totient is φ = 68517504.

The previous prime is 145506847. The next prime is 145506857. The reversal of 145506855 is 558605541.

It is not a de Polignac number, because 145506855 - 2³ = 145506847 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a nialpdrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145506857) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11737 + ... + 20706.

It is an arithmetic number, because the mean of its divisors is an integer number (8175888).

Almost surely, 2^145506855 is an apocalyptic number.

145506855 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

145506855 is a deficient number, since it is larger than the sum of its proper divisors (116121561).

145506855 is a wasteful number, since it uses less digits than its factorization.

145506855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32487.

The product of its (nonzero) digits is 120000, while the sum is 39.

The square root of 145506855 is about 12062.6222273600. The cubic root of 145506855 is about 525.9702149808.

The spelling of 145506855 in words is "one hundred forty-five million, five hundred six thousand, eight hundred fifty-five".