1051261081 has 16 divisors (see below), whose sum is σ = 1141862400. Its totient is φ = 962089920.

The previous prime is 1051261063. The next prime is 1051261087. The reversal of 1051261081 is 1801621501.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1051261081 - 2¹³ = 1051252889 is a prime.

It is a super-2 number, since 2×1051261081² = 2210299720850577122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1051261087) 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 15 ways as a sum of consecutive naturals, for example, 990291 + ... + 991351.

It is an arithmetic number, because the mean of its divisors is an integer number (71366400).

Almost surely, 2^1051261081 is an apocalyptic number.

It is an amenable number.

1051261081 is a deficient number, since it is larger than the sum of its proper divisors (90601319).

1051261081 is a wasteful number, since it uses less digits than its factorization.

1051261081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1656.

The product of its (nonzero) digits is 480, while the sum is 25.

The square root of 1051261081 is about 32423.1565551536. The cubic root of 1051261081 is about 1016.8031013650.

Adding to 1051261081 its reverse (1801621501), we get a palindrome (2852882582).

The spelling of 1051261081 in words is "one billion, fifty-one million, two hundred sixty-one thousand, eighty-one".