145442069 has 2 divisors, whose sum is σ = 145442070. Its totient is φ = 145442068.

The previous prime is 145442057. The next prime is 145442147. The reversal of 145442069 is 960244541.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 83631025 + 61811044 = 9145^2 + 7862^2 .

It is a cyclic number.

It is not a de Polignac number, because 145442069 - 2²⁴ = 128664853 is a prime.

It is a super-2 number, since 2×145442069² = 42306790870001522, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (145472069) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72721034 + 72721035.

It is an arithmetic number, because the mean of its divisors is an integer number (72721035).

Almost surely, 2^145442069 is an apocalyptic number.

It is an amenable number.

145442069 is a deficient number, since it is larger than the sum of its proper divisors (1).

145442069 is an equidigital number, since it uses as much as digits as its factorization.

145442069 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 34560, while the sum is 35.

The square root of 145442069 is about 12059.9365255378. The cubic root of 145442069 is about 525.8921417636.

The spelling of 145442069 in words is "one hundred forty-five million, four hundred forty-two thousand, sixty-nine".