145003661 has 12 divisors (see below), whose sum is σ = 165369120. Its totient is φ = 126085080.

The previous prime is 145003657. The next prime is 145003667. The reversal of 145003661 is 166300541.

It is not a de Polignac number, because 145003661 - 2² = 145003657 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 145003661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145003667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6641 + ... + 18278.

It is an arithmetic number, because the mean of its divisors is an integer number (13780760).

Almost surely, 2^145003661 is an apocalyptic number.

145003661 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

145003661 is a deficient number, since it is larger than the sum of its proper divisors (20365459).

145003661 is a wasteful number, since it uses less digits than its factorization.

145003661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24976 (or 24953 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 145003661 is about 12041.7465925837. The cubic root of 145003661 is about 525.3632086799.

The spelling of 145003661 in words is "one hundred forty-five million, three thousand, six hundred sixty-one".