1020415405 has 4 divisors (see below), whose sum is σ = 1224498492. Its totient is φ = 816332320.

The previous prime is 1020415393. The next prime is 1020415411. The reversal of 1020415405 is 5045140201.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 469198921 + 551216484 = 21661^2 + 23478^2 .

It is not a de Polignac number, because 1020415405 - 2²¹ = 1018318253 is a prime.

It is a super-2 number, since 2×1020415405² = 2082495197522628050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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, 102041536 + ... + 102041545.

It is an arithmetic number, because the mean of its divisors is an integer number (306124623).

Almost surely, 2^1020415405 is an apocalyptic number.

It is an amenable number.

1020415405 is a deficient number, since it is larger than the sum of its proper divisors (204083087).

1020415405 is an equidigital number, since it uses as much as digits as its factorization.

1020415405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 204083086.

The product of its (nonzero) digits is 800, while the sum is 22.

The square root of 1020415405 is about 31943.9416008732. The cubic root of 1020415405 is about 1006.7593433357.

Adding to 1020415405 its reverse (5045140201), we get a palindrome (6065555606).

The spelling of 1020415405 in words is "one billion, twenty million, four hundred fifteen thousand, four hundred five".