1361131421 has 16 divisors (see below), whose sum is σ = 1562125824. Its totient is φ = 1176219264.

The previous prime is 1361131411. The next prime is 1361131423. The reversal of 1361131421 is 1241311631.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-1361131421 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1361131423) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34376 + ... + 62481.

It is an arithmetic number, because the mean of its divisors is an integer number (97632864).

Almost surely, 2^1361131421 is an apocalyptic number.

It is an amenable number.

1361131421 is a deficient number, since it is larger than the sum of its proper divisors (200994403).

1361131421 is a wasteful number, since it uses less digits than its factorization.

1361131421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96940.

The product of its digits is 432, while the sum is 23.

The square root of 1361131421 is about 36893.5146197811. The cubic root of 1361131421 is about 1108.2388056843.

The spelling of 1361131421 in words is "one billion, three hundred sixty-one million, one hundred thirty-one thousand, four hundred twenty-one".