1606142381 has 2 divisors, whose sum is σ = 1606142382. Its totient is φ = 1606142380.

The previous prime is 1606142311. The next prime is 1606142401. The reversal of 1606142381 is 1832416061.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1168956100 + 437186281 = 34190^2 + 20909^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1606142381 is a prime.

It is a super-2 number, since 2×1606142381² = 5159386696088698322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1606142311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 803071190 + 803071191.

It is an arithmetic number, because the mean of its divisors is an integer number (803071191).

Almost surely, 2^1606142381 is an apocalyptic number.

It is an amenable number.

1606142381 is a deficient number, since it is larger than the sum of its proper divisors (1).

1606142381 is an equidigital number, since it uses as much as digits as its factorization.

1606142381 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6912, while the sum is 32.

The square root of 1606142381 is about 40076.7062144583. The cubic root of 1606142381 is about 1171.1018866683.

The spelling of 1606142381 in words is "one billion, six hundred six million, one hundred forty-two thousand, three hundred eighty-one".