1012778291 has 8 divisors (see below), whose sum is σ = 1165127424. Its totient is φ = 862345800.

The previous prime is 1012778287. The next prime is 1012778309. The reversal of 1012778291 is 1928772101.

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 1012778291 - 2² = 1012778287 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1012778491) 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 7 ways as a sum of consecutive naturals, for example, 478025 + ... + 480138.

It is an arithmetic number, because the mean of its divisors is an integer number (145640928).

Almost surely, 2^1012778291 is an apocalyptic number.

1012778291 is a deficient number, since it is larger than the sum of its proper divisors (152349133).

1012778291 is an equidigital number, since it uses as much as digits as its factorization.

1012778291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 958321.

The product of its (nonzero) digits is 14112, while the sum is 38.

The square root of 1012778291 is about 31824.1777741390. The cubic root of 1012778291 is about 1004.2414152958.

The spelling of 1012778291 in words is "one billion, twelve million, seven hundred seventy-eight thousand, two hundred ninety-one".