1056420387 has 144 divisors (see below), whose sum is σ = 1920988160. Its totient is φ = 577368000.

The previous prime is 1056420373. The next prime is 1056420397. The reversal of 1056420387 is 7830246501.

1056420387 is a `hidden beast` number, since 1 + 0 + 5 + 642 + 0 + 3 + 8 + 7 = 666.

It is not a de Polignac number, because 1056420387 - 2¹⁶ = 1056354851 is a prime.

It is a super-2 number, since 2×1056420387² = 2232048068138459538, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1056420397) 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 143 ways as a sum of consecutive naturals, for example, 17318337 + ... + 17318397.

Almost surely, 2^1056420387 is an apocalyptic number.

1056420387 is a deficient number, since it is larger than the sum of its proper divisors (864567773).

1056420387 is a wasteful number, since it uses less digits than its factorization.

1056420387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148 (or 125 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 36.

The square root of 1056420387 is about 32502.6212327560. The cubic root of 1056420387 is about 1018.4637860979.

Adding to 1056420387 its reverse (7830246501), we get a palindrome (8886666888).

The spelling of 1056420387 in words is "one billion, fifty-six million, four hundred twenty thousand, three hundred eighty-seven".