145054421 has 8 divisors (see below), whose sum is σ = 153702360. Its totient is φ = 136419328.

The previous prime is 145054409. The next prime is 145054453. The reversal of 145054421 is 124450541.

145054421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 4157521 + 140896900 = 2039^2 + 11870^2 .

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 145054421 - 2²² = 140860117 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 (145054621) 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, 29855 + ... + 34371.

It is an arithmetic number, because the mean of its divisors is an integer number (19212795).

Almost surely, 2^145054421 is an apocalyptic number.

It is an amenable number.

145054421 is a deficient number, since it is larger than the sum of its proper divisors (8647939).

145054421 is a wasteful number, since it uses less digits than its factorization.

145054421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6423.

The product of its (nonzero) digits is 3200, while the sum is 26.

The square root of 145054421 is about 12043.8540758347. The cubic root of 145054421 is about 525.4245044320.

The spelling of 145054421 in words is "one hundred forty-five million, fifty-four thousand, four hundred twenty-one".