1610453421 has 10 divisors (see below), whose sum is σ = 2405739182. Its totient is φ = 1073635560.

The previous prime is 1610453419. The next prime is 1610453447. The reversal of 1610453421 is 1243540161.

It is a happy number.

1610453421 is a `hidden beast` number, since 1 + 6 + 104 + 534 + 21 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1408500900 + 201952521 = 37530^2 + 14211^2 .

It is not a de Polignac number, because 1610453421 - 2¹ = 1610453419 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1610453521) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 9940990 + ... + 9941151.

Almost surely, 2^1610453421 is an apocalyptic number.

It is an amenable number.

1610453421 is a deficient number, since it is larger than the sum of its proper divisors (795285761).

1610453421 is an equidigital number, since it uses as much as digits as its factorization.

1610453421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19882153 (or 19882144 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 1610453421 is about 40130.4550310609. The cubic root of 1610453421 is about 1172.1487338274.

Adding to 1610453421 its reverse (1243540161), we get a palindrome (2853993582).

The spelling of 1610453421 in words is "one billion, six hundred ten million, four hundred fifty-three thousand, four hundred twenty-one".