1006542621 has 12 divisors (see below), whose sum is σ = 1661594272. Its totient is φ = 575167176.

The previous prime is 1006542619. The next prime is 1006542637. The reversal of 1006542621 is 1262456001.

1006542621 is a `hidden beast` number, since 1 + 0 + 0 + 654 + 2 + 6 + 2 + 1 = 666.

It is not a de Polignac number, because 1006542621 - 2¹ = 1006542619 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1006542601) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7988371 + ... + 7988496.

Almost surely, 2^1006542621 is an apocalyptic number.

It is an amenable number.

1006542621 is a deficient number, since it is larger than the sum of its proper divisors (655051651).

1006542621 is a wasteful number, since it uses less digits than its factorization.

1006542621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15976880 (or 15976877 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 1006542621 is about 31726.0558689541. The cubic root of 1006542621 is about 1002.1761346695.

Adding to 1006542621 its reverse (1262456001), we get a palindrome (2268998622).

The spelling of 1006542621 in words is "one billion, six million, five hundred forty-two thousand, six hundred twenty-one".