1610028421 has 2 divisors, whose sum is σ = 1610028422. Its totient is φ = 1610028420.

The previous prime is 1610028419. The next prime is 1610028437. The reversal of 1610028421 is 1248200161.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1047816900 + 562211521 = 32370^2 + 23711^2 .

It is a cyclic number.

It is not a de Polignac number, because 1610028421 - 2¹ = 1610028419 is a prime.

It is a super-3 number, since 3×1610028421³ (a number of 29 digits) contains 333 as substring.

Together with 1610028419, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1610020421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 805014210 + 805014211.

It is an arithmetic number, because the mean of its divisors is an integer number (805014211).

Almost surely, 2^1610028421 is an apocalyptic number.

It is an amenable number.

1610028421 is a deficient number, since it is larger than the sum of its proper divisors (1).

1610028421 is an equidigital number, since it uses as much as digits as its factorization.

1610028421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 768, while the sum is 25.

The square root of 1610028421 is about 40125.1594513966. The cubic root of 1610028421 is about 1172.0456144132.

Adding to 1610028421 its reverse (1248200161), we get a palindrome (2858228582).

It can be divided in two parts, 16100 and 28421, that added together give a square (44521 = 211²).

The spelling of 1610028421 in words is "one billion, six hundred ten million, twenty-eight thousand, four hundred twenty-one".