145872909 has 48 divisors (see below), whose sum is σ = 260670592. Its totient is φ = 76546944.

The previous prime is 145872893. The next prime is 145872911. The reversal of 145872909 is 909278541.

It is not a de Polignac number, because 145872909 - 2⁴ = 145872893 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145872919) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 226542 + ... + 227184.

Almost surely, 2^145872909 is an apocalyptic number.

It is an amenable number.

145872909 is a deficient number, since it is larger than the sum of its proper divisors (114797683).

145872909 is a wasteful number, since it uses less digits than its factorization.

145872909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 946 (or 943 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 45.

The square root of 145872909 is about 12077.7857656112. The cubic root of 145872909 is about 526.4109096205.

The spelling of 145872909 in words is "one hundred forty-five million, eight hundred seventy-two thousand, nine hundred nine".