1612263421 has 2 divisors, whose sum is σ = 1612263422. Its totient is φ = 1612263420.

The previous prime is 1612263397. The next prime is 1612263427. The reversal of 1612263421 is 1243622161.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1527715396 + 84548025 = 39086^2 + 9195^2 .

It is an emirp because it is prime and its reverse (1243622161) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1612263421 - 2²⁷ = 1478045693 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1612263421.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1612263427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 806131710 + 806131711.

It is an arithmetic number, because the mean of its divisors is an integer number (806131711).

Almost surely, 2^1612263421 is an apocalyptic number.

It is an amenable number.

1612263421 is a deficient number, since it is larger than the sum of its proper divisors (1).

1612263421 is an equidigital number, since it uses as much as digits as its factorization.

1612263421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3456, while the sum is 28.

The square root of 1612263421 is about 40153.0001494284. Note that the first 3 decimals coincide. The cubic root of 1612263421 is about 1172.5876981698.

Adding to 1612263421 its reverse (1243622161), we get a palindrome (2855885582).

The spelling of 1612263421 in words is "one billion, six hundred twelve million, two hundred sixty-three thousand, four hundred twenty-one".