1361720061 has 24 divisors (see below), whose sum is σ = 2119609856. Its totient is φ = 837436320.

The previous prime is 1361720057. The next prime is 1361720069. The reversal of 1361720061 is 1600271631.

1361720061 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1361720061 - 2² = 1361720057 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1361720069) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 248016 + ... + 253446.

Almost surely, 2^1361720061 is an apocalyptic number.

It is an amenable number.

1361720061 is a deficient number, since it is larger than the sum of its proper divisors (757889795).

1361720061 is a wasteful number, since it uses less digits than its factorization.

1361720061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7593 (or 7590 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 27.

The square root of 1361720061 is about 36901.4913113278. The cubic root of 1361720061 is about 1108.3985403637.

Adding to 1361720061 its reverse (1600271631), we get a palindrome (2961991692).

The spelling of 1361720061 in words is "one billion, three hundred sixty-one million, seven hundred twenty thousand, sixty-one".