36481421 has 2 divisors, whose sum is σ = 36481422. Its totient is φ = 36481420.

The previous prime is 36481373. The next prime is 36481429. The reversal of 36481421 is 12418463.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18748900 + 17732521 = 4330^2 + 4211^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-36481421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (36481429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18240710 + 18240711.

It is an arithmetic number, because the mean of its divisors is an integer number (18240711).

Almost surely, 2^36481421 is an apocalyptic number.

It is an amenable number.

36481421 is a deficient number, since it is larger than the sum of its proper divisors (1).

36481421 is an equidigital number, since it uses as much as digits as its factorization.

36481421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4608, while the sum is 29.

The square root of 36481421 is about 6039.9851821010. The cubic root of 36481421 is about 331.6580799047.

Adding to 36481421 its reverse (12418463), we get a palindrome (48899884).

The spelling of 36481421 in words is "thirty-six million, four hundred eighty-one thousand, four hundred twenty-one".