145254821 has 8 divisors (see below), whose sum is σ = 154431360. Its totient is φ = 136316752.

The previous prime is 145254799. The next prime is 145254869. The reversal of 145254821 is 128452541.

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 145254821 - 2¹⁴ = 145238437 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145254521) 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, 58361 + ... + 60798.

It is an arithmetic number, because the mean of its divisors is an integer number (19303920).

Almost surely, 2^145254821 is an apocalyptic number.

It is an amenable number.

145254821 is a deficient number, since it is larger than the sum of its proper divisors (9176539).

145254821 is a wasteful number, since it uses less digits than its factorization.

145254821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119235.

The product of its digits is 12800, while the sum is 32.

The square root of 145254821 is about 12052.1708003164. The cubic root of 145254821 is about 525.6663599071. Note that the first 3 decimals are identical.

The spelling of 145254821 in words is "one hundred forty-five million, two hundred fifty-four thousand, eight hundred twenty-one".