1361140591 has 8 divisors (see below), whose sum is σ = 1439319168. Its totient is φ = 1285104000.

The previous prime is 1361140559. The next prime is 1361140603. The reversal of 1361140591 is 1950411631.

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

It is not a de Polignac number, because 1361140591 - 2⁵ = 1361140559 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1361240591) 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, 534190 + ... + 536731.

It is an arithmetic number, because the mean of its divisors is an integer number (179914896).

Almost surely, 2^1361140591 is an apocalyptic number.

1361140591 is a deficient number, since it is larger than the sum of its proper divisors (78178577).

1361140591 is a wasteful number, since it uses less digits than its factorization.

1361140591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1070993.

The product of its (nonzero) digits is 3240, while the sum is 31.

The square root of 1361140591 is about 36893.6388961566. The cubic root of 1361140591 is about 1108.2412944293.

The spelling of 1361140591 in words is "one billion, three hundred sixty-one million, one hundred forty thousand, five hundred ninety-one".