145033421 has 8 divisors (see below), whose sum is σ = 157946040. Its totient is φ = 132371712.

The previous prime is 145033411. The next prime is 145033439. The reversal of 145033421 is 124330541.

It can be written as a sum of positive squares in 4 ways, for example, as 697225 + 144336196 = 835^2 + 12014^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-145033421 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145033411) 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 7 ways as a sum of consecutive naturals, for example, 61520 + ... + 63833.

It is an arithmetic number, because the mean of its divisors is an integer number (19743255).

Almost surely, 2^145033421 is an apocalyptic number.

It is an amenable number.

145033421 is a deficient number, since it is larger than the sum of its proper divisors (12912619).

145033421 is a wasteful number, since it uses less digits than its factorization.

145033421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125455.

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 145033421 is about 12042.9822303282. The cubic root of 145033421 is about 525.3991474038.

Adding to 145033421 its reverse (124330541), we get a palindrome (269363962).

The spelling of 145033421 in words is "one hundred forty-five million, thirty-three thousand, four hundred twenty-one".