1406221641 has 40 divisors (see below), whose sum is σ = 2295368064. Its totient is φ = 850862880.

The previous prime is 1406221637. The next prime is 1406221681. The reversal of 1406221641 is 1461226041.

1406221641 is a `hidden beast` number, since 1 + 406 + 2 + 216 + 41 = 666.

It is not a de Polignac number, because 1406221641 - 2² = 1406221637 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (1406221681) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 887536 + ... + 889118.

Almost surely, 2^1406221641 is an apocalyptic number.

1406221641 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1406221641 is a deficient number, since it is larger than the sum of its proper divisors (889146423).

1406221641 is a wasteful number, since it uses less digits than its factorization.

1406221641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2603 (or 2594 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 1406221641 is about 37499.6218780937. The cubic root of 1406221641 is about 1120.3436554386.

Adding to 1406221641 its reverse (1461226041), we get a palindrome (2867447682).

The spelling of 1406221641 in words is "one billion, four hundred six million, two hundred twenty-one thousand, six hundred forty-one".