1600442421 has 16 divisors (see below), whose sum is σ = 2221816128. Its totient is φ = 1023868800.

The previous prime is 1600442399. The next prime is 1600442429. The reversal of 1600442421 is 1242440061.

It is a happy number.

It is not a de Polignac number, because 1600442421 - 2¹⁰ = 1600441397 is a prime.

It is a super-2 number, since 2×1600442421² = 5122831885872682482, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1600442391 and 1600442400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1600442429) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 99151 + ... + 114156.

It is an arithmetic number, because the mean of its divisors is an integer number (138863508).

Almost surely, 2^1600442421 is an apocalyptic number.

It is an amenable number.

1600442421 is a deficient number, since it is larger than the sum of its proper divisors (621373707).

1600442421 is a wasteful number, since it uses less digits than its factorization.

1600442421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 213412.

The product of its (nonzero) digits is 1536, while the sum is 24.

The square root of 1600442421 is about 40005.5298802553. The cubic root of 1600442421 is about 1169.7148892546.

Adding to 1600442421 its reverse (1242440061), we get a palindrome (2842882482).

The spelling of 1600442421 in words is "one billion, six hundred million, four hundred forty-two thousand, four hundred twenty-one".