145248747 has 32 divisors (see below), whose sum is σ = 228271104. Its totient is φ = 80438400.

The previous prime is 145248743. The next prime is 145248781. The reversal of 145248747 is 747842541.

It is not a de Polignac number, because 145248747 - 2² = 145248743 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 145248699 and 145248708.

It is not an unprimeable number, because it can be changed into a prime (145248743) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 90153 + ... + 91749.

It is an arithmetic number, because the mean of its divisors is an integer number (7133472).

Almost surely, 2^145248747 is an apocalyptic number.

145248747 is a deficient number, since it is larger than the sum of its proper divisors (83022357).

145248747 is a wasteful number, since it uses less digits than its factorization.

145248747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1739.

The product of its digits is 250880, while the sum is 42.

The square root of 145248747 is about 12051.9188098825. The cubic root of 145248747 is about 525.6590326873.

The spelling of 145248747 in words is "one hundred forty-five million, two hundred forty-eight thousand, seven hundred forty-seven".