145255121 has 8 divisors (see below), whose sum is σ = 158557824. Its totient is φ = 131968720.

The previous prime is 145255111. The next prime is 145255147. The reversal of 145255121 is 121552541.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 145255121 - 2¹⁰ = 145254097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (145255111) 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, 21656 + ... + 27558.

It is an arithmetic number, because the mean of its divisors is an integer number (19819728).

Almost surely, 2^145255121 is an apocalyptic number.

145255121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

145255121 is a deficient number, since it is larger than the sum of its proper divisors (13302703).

145255121 is a wasteful number, since it uses less digits than its factorization.

145255121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8151.

The product of its digits is 2000, while the sum is 26.

The square root of 145255121 is about 12052.1832462007. The cubic root of 145255121 is about 525.6667217994. Note that the first 3 decimals are identical.

The spelling of 145255121 in words is "one hundred forty-five million, two hundred fifty-five thousand, one hundred twenty-one".