145355839 has 4 divisors (see below), whose sum is σ = 148098456. Its totient is φ = 142613224.

The previous prime is 145355803. The next prime is 145355843. The reversal of 145355839 is 938553541.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 145355839 - 2¹³ = 145347647 is a prime.

It is a super-2 number, since 2×145355839² = 42256639862787842, 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 = 145355795 and 145355804.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145355849) 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, 1371229 + ... + 1371334.

It is an arithmetic number, because the mean of its divisors is an integer number (37024614).

Almost surely, 2^145355839 is an apocalyptic number.

145355839 is a deficient number, since it is larger than the sum of its proper divisors (2742617).

145355839 is an equidigital number, since it uses as much as digits as its factorization.

145355839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2742616.

The product of its digits is 324000, while the sum is 43.

The square root of 145355839 is about 12056.3609352076. The cubic root of 145355839 is about 525.7881905373.

The spelling of 145355839 in words is "one hundred forty-five million, three hundred fifty-five thousand, eight hundred thirty-nine".