145502047 has 4 divisors (see below), whose sum is σ = 145546240. Its totient is φ = 145457856.

The previous prime is 145502039. The next prime is 145502051. The reversal of 145502047 is 740205541.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 740205541 = 29 ⋅25524329.

It is a cyclic number.

It is not a de Polignac number, because 145502047 - 2³ = 145502039 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 (145502087) 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, 16722 + ... + 23887.

It is an arithmetic number, because the mean of its divisors is an integer number (36386560).

Almost surely, 2^145502047 is an apocalyptic number.

145502047 is a deficient number, since it is larger than the sum of its proper divisors (44193).

145502047 is an equidigital number, since it uses as much as digits as its factorization.

145502047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44192.

The product of its (nonzero) digits is 5600, while the sum is 28.

The square root of 145502047 is about 12062.4229323963. The cubic root of 145502047 is about 525.9644216853.

Adding to 145502047 its reverse (740205541), we get a palindrome (885707588).

The spelling of 145502047 in words is "one hundred forty-five million, five hundred two thousand, forty-seven".