145555601 has 4 divisors (see below), whose sum is σ = 145580400. Its totient is φ = 145530804.

The previous prime is 145555591. The next prime is 145555603. The reversal of 145555601 is 106555541.

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 145555601 - 2¹⁸ = 145293457 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (145555603) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1910 + ... + 17168.

It is an arithmetic number, because the mean of its divisors is an integer number (36395100).

Almost surely, 2^145555601 is an apocalyptic number.

It is an amenable number.

145555601 is a deficient number, since it is larger than the sum of its proper divisors (24799).

145555601 is an equidigital number, since it uses as much as digits as its factorization.

145555601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24798.

The product of its (nonzero) digits is 15000, while the sum is 32.

The square root of 145555601 is about 12064.6425972757. The cubic root of 145555601 is about 526.0289432140.

The spelling of 145555601 in words is "one hundred forty-five million, five hundred fifty-five thousand, six hundred one".