145432661 has 4 divisors (see below), whose sum is σ = 158653824. Its totient is φ = 132211500.

The previous prime is 145432643. The next prime is 145432691. The reversal of 145432661 is 166234541.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 145432661 - 2⁶ = 145432597 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 (145432691) 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 3 ways as a sum of consecutive naturals, for example, 6610565 + ... + 6610586.

It is an arithmetic number, because the mean of its divisors is an integer number (39663456).

Almost surely, 2^145432661 is an apocalyptic number.

145432661 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

145432661 is a deficient number, since it is larger than the sum of its proper divisors (13221163).

145432661 is a wasteful number, since it uses less digits than its factorization.

145432661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13221162.

The product of its digits is 17280, while the sum is 32.

The square root of 145432661 is about 12059.5464674257. The cubic root of 145432661 is about 525.8808023119.

The spelling of 145432661 in words is "one hundred forty-five million, four hundred thirty-two thousand, six hundred sixty-one".