1365214021 has 4 divisors (see below), whose sum is σ = 1366151200. Its totient is φ = 1364276844.

The previous prime is 1365214001. The next prime is 1365214027. The reversal of 1365214021 is 1204125631.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1204125631 = 59 ⋅20408909.

It is a cyclic number.

It is not a de Polignac number, because 1365214021 - 2⁵ = 1365213989 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 (1365214027) 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, 466401 + ... + 469318.

It is an arithmetic number, because the mean of its divisors is an integer number (341537800).

Almost surely, 2^1365214021 is an apocalyptic number.

It is an amenable number.

1365214021 is a deficient number, since it is larger than the sum of its proper divisors (937179).

1365214021 is an equidigital number, since it uses as much as digits as its factorization.

1365214021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 937178.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 1365214021 is about 36948.8027004936. The cubic root of 1365214021 is about 1109.3457229605.

Adding to 1365214021 its reverse (1204125631), we get a palindrome (2569339652).

The spelling of 1365214021 in words is "one billion, three hundred sixty-five million, two hundred fourteen thousand, twenty-one".