145015238 has 4 divisors (see below), whose sum is σ = 217522860. Its totient is φ = 72507618.

The previous prime is 145015229. The next prime is 145015249. The reversal of 145015238 is 832510541.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 832510541 = 947 ⋅879103.

It is a self number, because there is not a number n which added to its sum of digits gives 145015238.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 36253808 + ... + 36253811.

It is an arithmetic number, because the mean of its divisors is an integer number (54380715).

Almost surely, 2^145015238 is an apocalyptic number.

145015238 is a deficient number, since it is larger than the sum of its proper divisors (72507622).

145015238 is an equidigital number, since it uses as much as digits as its factorization.

145015238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72507621.

The product of its (nonzero) digits is 4800, while the sum is 29.

The square root of 145015238 is about 12042.2272856810. The cubic root of 145015238 is about 525.3771898626.

Adding to 145015238 its reverse (832510541), we get a palindrome (977525779).

The spelling of 145015238 in words is "one hundred forty-five million, fifteen thousand, two hundred thirty-eight".