145442239 has 8 divisors (see below), whose sum is σ = 149702720. Its totient is φ = 141242400.

The previous prime is 145442237. The next prime is 145442249. The reversal of 145442239 is 932244541.

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 145442239 - 2¹ = 145442237 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 (145442237) 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, 10272 + ... + 19909.

It is an arithmetic number, because the mean of its divisors is an integer number (18712840).

Almost surely, 2^145442239 is an apocalyptic number.

145442239 is a deficient number, since it is larger than the sum of its proper divisors (4260481).

145442239 is an equidigital number, since it uses as much as digits as its factorization.

145442239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30321.

The product of its digits is 34560, while the sum is 34.

The square root of 145442239 is about 12059.9435736657. The cubic root of 145442239 is about 525.8923466599.

The spelling of 145442239 in words is "one hundred forty-five million, four hundred forty-two thousand, two hundred thirty-nine".