145601749 has 2 divisors, whose sum is σ = 145601750. Its totient is φ = 145601748.

The previous prime is 145601711. The next prime is 145601767. The reversal of 145601749 is 947106541.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 95687524 + 49914225 = 9782^2 + 7065^2 .

It is a cyclic number.

It is not a de Polignac number, because 145601749 - 2²⁵ = 112047317 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (145601149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72800874 + 72800875.

It is an arithmetic number, because the mean of its divisors is an integer number (72800875).

Almost surely, 2^145601749 is an apocalyptic number.

It is an amenable number.

145601749 is a deficient number, since it is larger than the sum of its proper divisors (1).

145601749 is an equidigital number, since it uses as much as digits as its factorization.

145601749 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 30240, while the sum is 37.

The square root of 145601749 is about 12066.5549764628. The cubic root of 145601749 is about 526.0845293463.

The spelling of 145601749 in words is "one hundred forty-five million, six hundred one thousand, seven hundred forty-nine".