1020043261 has 8 divisors (see below), whose sum is σ = 1064712960. Its totient is φ = 975400272.

The previous prime is 1020043229. The next prime is 1020043267. The reversal of 1020043261 is 1623400201.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1020043261 - 2⁵ = 1020043229 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1020043267) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 143100 + ... + 150058.

It is an arithmetic number, because the mean of its divisors is an integer number (133089120).

Almost surely, 2^1020043261 is an apocalyptic number.

It is an amenable number.

1020043261 is a deficient number, since it is larger than the sum of its proper divisors (44669699).

1020043261 is an equidigital number, since it uses as much as digits as its factorization.

1020043261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13355.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 1020043261 is about 31938.1161153879. The cubic root of 1020043261 is about 1006.6369405697.

Adding to 1020043261 its reverse (1623400201), we get a palindrome (2643443462).

The spelling of 1020043261 in words is "one billion, twenty million, forty-three thousand, two hundred sixty-one".