1051865047 has 4 divisors (see below), whose sum is σ = 1052382960. Its totient is φ = 1051347136.

The previous prime is 1051865041. The next prime is 1051865057. The reversal of 1051865047 is 7405681501.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1051865047 is a prime.

It is a super-2 number, since 2×1051865047² = 2212840154200624418, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1051864997 and 1051865015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1051865041) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 255898 + ... + 259975.

It is an arithmetic number, because the mean of its divisors is an integer number (263095740).

Almost surely, 2^1051865047 is an apocalyptic number.

1051865047 is a deficient number, since it is larger than the sum of its proper divisors (517913).

1051865047 is an equidigital number, since it uses as much as digits as its factorization.

1051865047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 517912.

The product of its (nonzero) digits is 33600, while the sum is 37.

The square root of 1051865047 is about 32432.4690241122. The cubic root of 1051865047 is about 1016.9977872030.

The spelling of 1051865047 in words is "one billion, fifty-one million, eight hundred sixty-five thousand, forty-seven".