145270009 has 2 divisors, whose sum is σ = 145270010. Its totient is φ = 145270008.

The previous prime is 145269989. The next prime is 145270031. The reversal of 145270009 is 900072541.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 93026025 + 52243984 = 9645^2 + 7228^2 .

It is a cyclic number.

It is not a de Polignac number, because 145270009 - 2¹⁵ = 145237241 is a prime.

It is a super-2 number, since 2×145270009² = 42206751029720162, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (145270109) 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, 72635004 + 72635005.

It is an arithmetic number, because the mean of its divisors is an integer number (72635005).

Almost surely, 2^145270009 is an apocalyptic number.

It is an amenable number.

145270009 is a deficient number, since it is larger than the sum of its proper divisors (1).

145270009 is an equidigital number, since it uses as much as digits as its factorization.

145270009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2520, while the sum is 28.

The square root of 145270009 is about 12052.8008778043. The cubic root of 145270009 is about 525.6846806815.

The spelling of 145270009 in words is "one hundred forty-five million, two hundred seventy thousand, nine".