861137201 has 8 divisors (see below), whose sum is σ = 877885344. Its totient is φ = 844540960.

The previous prime is 861137161. The next prime is 861137219. The reversal of 861137201 is 102731168.

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 861137201 - 2²² = 856942897 is a prime.

It is a super-2 number, since 2×861137201² = 1483114557892228802, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (861137231) 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, 26495 + ... + 49236.

It is an arithmetic number, because the mean of its divisors is an integer number (109735668).

Almost surely, 2^861137201 is an apocalyptic number.

It is an amenable number.

861137201 is a deficient number, since it is larger than the sum of its proper divisors (16748143).

861137201 is a wasteful number, since it uses less digits than its factorization.

861137201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75951.

The product of its (nonzero) digits is 2016, while the sum is 29.

The square root of 861137201 is about 29345.1393078990. The cubic root of 861137201 is about 951.3875203960.

Adding to 861137201 its reverse (102731168), we get a palindrome (963868369).

The spelling of 861137201 in words is "eight hundred sixty-one million, one hundred thirty-seven thousand, two hundred one".