1361421847 has 4 divisors (see below), whose sum is σ = 1362312616. Its totient is φ = 1360531080.

The previous prime is 1361421827. The next prime is 1361421857. The reversal of 1361421847 is 7481241631.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7481241631 = 7517 ⋅995243.

It is a cyclic number.

It is not a de Polignac number, because 1361421847 - 2²⁷ = 1227204119 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1361421827) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 443088 + ... + 446149.

It is an arithmetic number, because the mean of its divisors is an integer number (340578154).

Almost surely, 2^1361421847 is an apocalyptic number.

1361421847 is a deficient number, since it is larger than the sum of its proper divisors (890769).

1361421847 is an equidigital number, since it uses as much as digits as its factorization.

1361421847 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 890768.

The product of its digits is 32256, while the sum is 37.

The square root of 1361421847 is about 36897.4504132738. The cubic root of 1361421847 is about 1108.3176220937.

The spelling of 1361421847 in words is "one billion, three hundred sixty-one million, four hundred twenty-one thousand, eight hundred forty-seven".