1020081437 has 4 divisors (see below), whose sum is σ = 1020147936. Its totient is φ = 1020014940.

The previous prime is 1020081431. The next prime is 1020081449. The reversal of 1020081437 is 7341800201.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 7341800201 = 317 ⋅23160253.

It is a cyclic number.

It is not a de Polignac number, because 1020081437 - 2¹² = 1020077341 is a prime.

It is a super-2 number, since 2×1020081437² = 2081132276223969938, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1020081431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2762 + ... + 45252.

It is an arithmetic number, because the mean of its divisors is an integer number (255036984).

Almost surely, 2^1020081437 is an apocalyptic number.

It is an amenable number.

1020081437 is a deficient number, since it is larger than the sum of its proper divisors (66499).

1020081437 is an equidigital number, since it uses as much as digits as its factorization.

1020081437 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66498.

The product of its (nonzero) digits is 1344, while the sum is 26.

The square root of 1020081437 is about 31938.7137655855. The cubic root of 1020081437 is about 1006.6494984987.

Adding to 1020081437 its reverse (7341800201), we get a palindrome (8361881638).

The spelling of 1020081437 in words is "one billion, twenty million, eighty-one thousand, four hundred thirty-seven".