145333439 has 4 divisors (see below), whose sum is σ = 146086656. Its totient is φ = 144580224.

The previous prime is 145333399. The next prime is 145333469. The reversal of 145333439 is 934333541.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 934333541 = 43 ⋅21728687.

It is a cyclic number.

It is not a de Polignac number, because 145333439 - 2⁸ = 145333183 is a prime.

It is a super-2 number, since 2×145333439² = 42243616983133442, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 145333399 and 145333408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145333469) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 376319 + ... + 376704.

It is an arithmetic number, because the mean of its divisors is an integer number (36521664).

Almost surely, 2^145333439 is an apocalyptic number.

145333439 is a deficient number, since it is larger than the sum of its proper divisors (753217).

145333439 is an equidigital number, since it uses as much as digits as its factorization.

145333439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 753216.

The product of its digits is 58320, while the sum is 35.

The square root of 145333439 is about 12055.4319292176. The cubic root of 145333439 is about 525.7611803610.

The spelling of 145333439 in words is "one hundred forty-five million, three hundred thirty-three thousand, four hundred thirty-nine".