145020247 has 2 divisors, whose sum is σ = 145020248. Its totient is φ = 145020246.

The previous prime is 145020167. The next prime is 145020259. The reversal of 145020247 is 742020541.

145020247 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-145020247 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (145020347) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72510123 + 72510124.

It is an arithmetic number, because the mean of its divisors is an integer number (72510124).

Almost surely, 2^145020247 is an apocalyptic number.

145020247 is a deficient number, since it is larger than the sum of its proper divisors (1).

145020247 is an equidigital number, since it uses as much as digits as its factorization.

145020247 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2240, while the sum is 25.

The square root of 145020247 is about 12042.4352603616. The cubic root of 145020247 is about 525.3832388454.

Adding to 145020247 its reverse (742020541), we get a palindrome (887040788).

The spelling of 145020247 in words is "one hundred forty-five million, twenty thousand, two hundred forty-seven".