1012949281 has 4 divisors (see below), whose sum is σ = 1013013652. Its totient is φ = 1012884912.

The previous prime is 1012949257. The next prime is 1012949291. The reversal of 1012949281 is 1829492101.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 450500625 + 562448656 = 21225^2 + 23716^2 .

It is a cyclic number.

It is not a de Polignac number, because 1012949281 - 2¹⁹ = 1012424993 is a prime.

It is a super-2 number, since 2×1012949281² = 2052132491756833922, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1012949281.

It is not an unprimeable number, because it can be changed into a prime (1012949221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8911 + ... + 45883.

It is an arithmetic number, because the mean of its divisors is an integer number (253253413).

Almost surely, 2^1012949281 is an apocalyptic number.

It is an amenable number.

1012949281 is a deficient number, since it is larger than the sum of its proper divisors (64371).

1012949281 is an equidigital number, since it uses as much as digits as its factorization.

1012949281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64370.

The product of its (nonzero) digits is 10368, while the sum is 37.

The square root of 1012949281 is about 31826.8641402197. The cubic root of 1012949281 is about 1004.2979283479.

The spelling of 1012949281 in words is "one billion, twelve million, nine hundred forty-nine thousand, two hundred eighty-one".