145901509 has 8 divisors (see below), whose sum is σ = 157347680. Its totient is φ = 134487216.

The previous prime is 145901491. The next prime is 145901519. The reversal of 145901509 is 905109541.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 145901509 - 2¹³ = 145893317 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145901519) 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 in 7 ways as a sum of consecutive naturals, for example, 2014 + ... + 17200.

It is an arithmetic number, because the mean of its divisors is an integer number (19668460).

Almost surely, 2^145901509 is an apocalyptic number.

It is an amenable number.

145901509 is a deficient number, since it is larger than the sum of its proper divisors (11446171).

145901509 is a wasteful number, since it uses less digits than its factorization.

145901509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15939.

The product of its (nonzero) digits is 8100, while the sum is 34.

The square root of 145901509 is about 12078.9696994404. The cubic root of 145901509 is about 526.4453102695.

The spelling of 145901509 in words is "one hundred forty-five million, nine hundred one thousand, five hundred nine".