145011409 has 2 divisors, whose sum is σ = 145011410. Its totient is φ = 145011408.

The previous prime is 145011407. The next prime is 145011413. The reversal of 145011409 is 904110541.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 94031809 + 50979600 = 9697^2 + 7140^2 .

It is a cyclic number.

It is not a de Polignac number, because 145011409 - 2¹ = 145011407 is a prime.

Together with 145011407, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (145011407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72505704 + 72505705.

It is an arithmetic number, because the mean of its divisors is an integer number (72505705).

Almost surely, 2^145011409 is an apocalyptic number.

It is an amenable number.

145011409 is a deficient number, since it is larger than the sum of its proper divisors (1).

145011409 is an equidigital number, since it uses as much as digits as its factorization.

145011409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 720, while the sum is 25.

The square root of 145011409 is about 12042.0683024138. The cubic root of 145011409 is about 525.3725657808.

The spelling of 145011409 in words is "one hundred forty-five million, eleven thousand, four hundred nine".