101290561 has 8 divisors (see below), whose sum is σ = 104259200. Its totient is φ = 98364240.

The previous prime is 101290559. The next prime is 101290583. The reversal of 101290561 is 165092101.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 101290561 - 2¹ = 101290559 is a prime.

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

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (101290531) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5691 + ... + 15328.

It is an arithmetic number, because the mean of its divisors is an integer number (13032400).

Almost surely, 2^101290561 is an apocalyptic number.

It is an amenable number.

101290561 is a deficient number, since it is larger than the sum of its proper divisors (2968639).

101290561 is an equidigital number, since it uses as much as digits as its factorization.

101290561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21159.

The product of its (nonzero) digits is 540, while the sum is 25.

The square root of 101290561 is about 10064.3211892308. The cubic root of 101290561 is about 466.1471058347.

The spelling of 101290561 in words is "one hundred one million, two hundred ninety thousand, five hundred sixty-one".