36403421 has 12 divisors (see below), whose sum is σ = 37989972. Its totient is φ = 34864128.

The previous prime is 36403417. The next prime is 36403453. The reversal of 36403421 is 12430463.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 343396 + 36060025 = 586^2 + 6005^2 .

It is not a de Polignac number, because 36403421 - 2² = 36403417 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 (36403321) 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, 375245 + ... + 375341.

It is an arithmetic number, because the mean of its divisors is an integer number (3165831).

Almost surely, 2^36403421 is an apocalyptic number.

It is an amenable number.

36403421 is a deficient number, since it is larger than the sum of its proper divisors (1586551).

36403421 is an frugal number, since it uses more digits than its factorization.

36403421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 320 (or 223 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 23.

The square root of 36403421 is about 6033.5247575526. The cubic root of 36403421 is about 331.4215413388.

Adding to 36403421 its reverse (12430463), we get a palindrome (48833884).

The spelling of 36403421 in words is "thirty-six million, four hundred three thousand, four hundred twenty-one".