1642137241 has 4 divisors (see below), whose sum is σ = 1642218292. Its totient is φ = 1642056192.

The previous prime is 1642137221. The next prime is 1642137247. The reversal of 1642137241 is 1427312461.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 1198613641 + 443523600 = 34621^2 + 21060^2 .

It is a cyclic number.

It is not a de Polignac number, because 1642137241 - 2¹⁹ = 1641612953 is a prime.

It is a super-2 number, since 2×1642137241² = 5393229436558184162, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1642137247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19705 + ... + 60601.

It is an arithmetic number, because the mean of its divisors is an integer number (410554573).

Almost surely, 2^1642137241 is an apocalyptic number.

It is an amenable number.

1642137241 is a deficient number, since it is larger than the sum of its proper divisors (81051).

1642137241 is an equidigital number, since it uses as much as digits as its factorization.

1642137241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81050.

The product of its digits is 8064, while the sum is 31.

The square root of 1642137241 is about 40523.2925735311. The cubic root of 1642137241 is about 1179.7857604445.

The spelling of 1642137241 in words is "one billion, six hundred forty-two million, one hundred thirty-seven thousand, two hundred forty-one".