145754621 has 2 divisors, whose sum is σ = 145754622. Its totient is φ = 145754620.

The previous prime is 145754573. The next prime is 145754627. The reversal of 145754621 is 126457541.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 80371225 + 65383396 = 8965^2 + 8086^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-145754621 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (145754627) 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 as a sum of consecutive naturals, namely, 72877310 + 72877311.

It is an arithmetic number, because the mean of its divisors is an integer number (72877311).

Almost surely, 2^145754621 is an apocalyptic number.

It is an amenable number.

145754621 is a deficient number, since it is larger than the sum of its proper divisors (1).

145754621 is an equidigital number, since it uses as much as digits as its factorization.

145754621 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 33600, while the sum is 35.

The square root of 145754621 is about 12072.8878483982. The cubic root of 145754621 is about 526.2685826851.

The spelling of 145754621 in words is "one hundred forty-five million, seven hundred fifty-four thousand, six hundred twenty-one".