1361621412 has 36 divisors (see below), whose sum is σ = 3461787420. Its totient is φ = 451248192.

The previous prime is 1361621399. The next prime is 1361621419. The reversal of 1361621412 is 2141261631.

It is a happy number.

1361621412 is a `hidden beast` number, since 1 + 3 + 616 + 2 + 1 + 41 + 2 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1127347776 + 234273636 = 33576^2 + 15306^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (1361621419) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 103087 + ... + 115542.

Almost surely, 2^1361621412 is an apocalyptic number.

1361621412 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1361621412 is an abundant number, since it is smaller than the sum of its proper divisors (2100166008).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1361621412 is a wasteful number, since it uses less digits than its factorization.

1361621412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 218812 (or 218807 counting only the distinct ones).

The product of its digits is 1728, while the sum is 27.

The square root of 1361621412 is about 36900.1546338223. The cubic root of 1361621412 is about 1108.3717739596.

The spelling of 1361621412 in words is "one billion, three hundred sixty-one million, six hundred twenty-one thousand, four hundred twelve".