1051855869 has 16 divisors (see below), whose sum is σ = 1441379520. Its totient is φ = 681811200.

The previous prime is 1051855859. The next prime is 1051855933. The reversal of 1051855869 is 9685581501.

It is not a de Polignac number, because 1051855869 - 2¹¹ = 1051853821 is a prime.

It is a super-2 number, since 2×1051855869² = 2212801538299490322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1051855829) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 234094 + ... + 238544.

It is an arithmetic number, because the mean of its divisors is an integer number (90086220).

Almost surely, 2^1051855869 is an apocalyptic number.

It is an amenable number.

1051855869 is a deficient number, since it is larger than the sum of its proper divisors (389523651).

1051855869 is a wasteful number, since it uses less digits than its factorization.

1051855869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6620.

The product of its (nonzero) digits is 432000, while the sum is 48.

The square root of 1051855869 is about 32432.3275297966. The cubic root of 1051855869 is about 1016.9948292719.

The spelling of 1051855869 in words is "one billion, fifty-one million, eight hundred fifty-five thousand, eight hundred sixty-nine".