145921856 has 14 divisors (see below), whose sum is σ = 289563810. Its totient is φ = 72960896.

The previous prime is 145921849. The next prime is 145921859. The reversal of 145921856 is 658129541.

It can be written as a sum of positive squares in only one way, i.e., 144384256 + 1537600 = 12016^2 + 1240^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145921859) 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 as a sum of consecutive naturals, namely, 1139951 + ... + 1140078.

Almost surely, 2^145921856 is an apocalyptic number.

145921856 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

145921856 is a deficient number, since it is larger than the sum of its proper divisors (143641954).

145921856 is an equidigital number, since it uses as much as digits as its factorization.

145921856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2280041 (or 2280031 counting only the distinct ones).

The product of its digits is 86400, while the sum is 41.

The square root of 145921856 is about 12079.8119190656. The cubic root of 145921856 is about 526.4697813091.

The spelling of 145921856 in words is "one hundred forty-five million, nine hundred twenty-one thousand, eight hundred fifty-six".