1051785057 has 4 divisors (see below), whose sum is σ = 1402380080. Its totient is φ = 701190036.

The previous prime is 1051785037. The next prime is 1051785127. The reversal of 1051785057 is 7505871501.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a de Polignac number, because none of the positive numbers 2^k-1051785057 is a prime.

It is a super-2 number, since 2×1051785057² = 2212503612256986498, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1051785017) 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, 175297507 + ... + 175297512.

It is an arithmetic number, because the mean of its divisors is an integer number (350595020).

Almost surely, 2^1051785057 is an apocalyptic number.

It is an amenable number.

1051785057 is a deficient number, since it is larger than the sum of its proper divisors (350595023).

1051785057 is an equidigital number, since it uses as much as digits as its factorization.

1051785057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 350595022.

The product of its (nonzero) digits is 49000, while the sum is 39.

The square root of 1051785057 is about 32431.2358228915. The cubic root of 1051785057 is about 1016.9720070532.

The spelling of 1051785057 in words is "one billion, fifty-one million, seven hundred eighty-five thousand, fifty-seven".