145538747 has 4 divisors (see below), whose sum is σ = 145615296. Its totient is φ = 145462200.

The previous prime is 145538737. The next prime is 145538759. The reversal of 145538747 is 747835541.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 747835541 = 239 ⋅3129019.

It is a cyclic number.

It is not a de Polignac number, because 145538747 - 2¹⁰ = 145537723 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 145538698 and 145538707.

It is not an unprimeable number, because it can be changed into a prime (145538737) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35348 + ... + 39249.

It is an arithmetic number, because the mean of its divisors is an integer number (36403824).

Almost surely, 2^145538747 is an apocalyptic number.

145538747 is a deficient number, since it is larger than the sum of its proper divisors (76549).

145538747 is an equidigital number, since it uses as much as digits as its factorization.

145538747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76548.

The product of its digits is 470400, while the sum is 44.

The square root of 145538747 is about 12063.9440897246. The cubic root of 145538747 is about 526.0086393257.

The spelling of 145538747 in words is "one hundred forty-five million, five hundred thirty-eight thousand, seven hundred forty-seven".