61291001 has 8 divisors (see below), whose sum is σ = 65334600. Its totient is φ = 57296128.

The previous prime is 61290919. The next prime is 61291003. The reversal of 61291001 is 10019216.

It can be written as a sum of positive squares in 4 ways, for example, as 2016400 + 59274601 = 1420^2 + 7699^2 .

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 61291001 - 2¹⁴ = 61274617 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61291003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9566 + ... + 14631.

It is an arithmetic number, because the mean of its divisors is an integer number (8166825).

Almost surely, 2^61291001 is an apocalyptic number.

It is an amenable number.

61291001 is a deficient number, since it is larger than the sum of its proper divisors (4043599).

61291001 is a wasteful number, since it uses less digits than its factorization.

61291001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24363.

The product of its (nonzero) digits is 108, while the sum is 20.

The square root of 61291001 is about 7828.8569408311. The cubic root of 61291001 is about 394.2746952780.

The spelling of 61291001 in words is "sixty-one million, two hundred ninety-one thousand, one".