1006621401 has 8 divisors (see below), whose sum is σ = 1348907200. Its totient is φ = 667708272.

The previous prime is 1006621373. The next prime is 1006621409. The reversal of 1006621401 is 1041266001.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-1006621401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1006621409) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 842470 + ... + 843663.

It is an arithmetic number, because the mean of its divisors is an integer number (168613400).

Almost surely, 2^1006621401 is an apocalyptic number.

It is an amenable number.

1006621401 is a deficient number, since it is larger than the sum of its proper divisors (342285799).

1006621401 is a wasteful number, since it uses less digits than its factorization.

1006621401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1686335.

The product of its (nonzero) digits is 288, while the sum is 21.

The square root of 1006621401 is about 31727.2974109047. The cubic root of 1006621401 is about 1002.2022800688.

Adding to 1006621401 its reverse (1041266001), we get a palindrome (2047887402).

The spelling of 1006621401 in words is "one billion, six million, six hundred twenty-one thousand, four hundred one".