1021041620 has 12 divisors (see below), whose sum is σ = 2144187444. Its totient is φ = 408416640.

The previous prime is 1021041563. The next prime is 1021041647. The reversal of 1021041620 is 261401201.

It can be written as a sum of positive squares in 2 ways, for example, as 604963216 + 416078404 = 24596^2 + 20398^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25526021 + ... + 25526060.

It is an arithmetic number, because the mean of its divisors is an integer number (178682287).

Almost surely, 2^1021041620 is an apocalyptic number.

1021041620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1021041620 is an abundant number, since it is smaller than the sum of its proper divisors (1123145824).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1021041620 is a wasteful number, since it uses less digits than its factorization.

1021041620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51052090 (or 51052088 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 1021041620 is about 31953.7418779084. The cubic root of 1021041620 is about 1006.9652460421.

Adding to 1021041620 its reverse (261401201), we get a palindrome (1282442821).

The spelling of 1021041620 in words is "one billion, twenty-one million, forty-one thousand, six hundred twenty".