145235421 has 12 divisors (see below), whose sum is σ = 210164448. Its totient is φ = 96648264.

The previous prime is 145235413. The next prime is 145235429. The reversal of 145235421 is 124532541.

145235421 is a `hidden beast` number, since 1 + 4 + 5 + 235 + 421 = 666.

145235421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (145235413) and next prime (145235429).

It is not a de Polignac number, because 145235421 - 2³ = 145235413 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145235429) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9265 + ... + 19398.

It is an arithmetic number, because the mean of its divisors is an integer number (17513704).

Almost surely, 2^145235421 is an apocalyptic number.

It is an amenable number.

145235421 is a deficient number, since it is larger than the sum of its proper divisors (64929027).

145235421 is a wasteful number, since it uses less digits than its factorization.

145235421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29232 (or 29229 counting only the distinct ones).

The product of its digits is 4800, while the sum is 27.

The square root of 145235421 is about 12051.3659391788. The cubic root of 145235421 is about 525.6429564809.

Adding to 145235421 its reverse (124532541), we get a palindrome (269767962).

The spelling of 145235421 in words is "one hundred forty-five million, two hundred thirty-five thousand, four hundred twenty-one".