101590945 has 4 divisors (see below), whose sum is σ = 121909140. Its totient is φ = 81272752.

The previous prime is 101590939. The next prime is 101590987. The reversal of 101590945 is 549095101.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 72182016 + 29408929 = 8496^2 + 5423^2 .

It is a cyclic number.

It is not a de Polignac number, because 101590945 - 2⁷ = 101590817 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 101590945.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10159090 + ... + 10159099.

It is an arithmetic number, because the mean of its divisors is an integer number (30477285).

Almost surely, 2^101590945 is an apocalyptic number.

It is an amenable number.

101590945 is a deficient number, since it is larger than the sum of its proper divisors (20318195).

101590945 is an equidigital number, since it uses as much as digits as its factorization.

101590945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20318194.

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

The square root of 101590945 is about 10079.2333537824. The cubic root of 101590945 is about 466.6074479845.

The spelling of 101590945 in words is "one hundred one million, five hundred ninety thousand, nine hundred forty-five".