1021406445 has 24 divisors (see below), whose sum is σ = 1827551232. Its totient is φ = 527176800.

The previous prime is 1021406443. The next prime is 1021406467. The reversal of 1021406445 is 5446041201.

1021406445 is a `hidden beast` number, since 1 + 0 + 2 + 14 + 0 + 644 + 5 = 666.

It is not a de Polignac number, because 1021406445 - 2¹ = 1021406443 is a prime.

It is a super-2 number, since 2×1021406445² = 2086542251775076050, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021406443) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 364701 + ... + 367490.

It is an arithmetic number, because the mean of its divisors is an integer number (76147968).

Almost surely, 2^1021406445 is an apocalyptic number.

1021406445 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1021406445 is a deficient number, since it is larger than the sum of its proper divisors (806144787).

1021406445 is a wasteful number, since it uses less digits than its factorization.

1021406445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 732233 (or 732230 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

The square root of 1021406445 is about 31959.4500109123. The cubic root of 1021406445 is about 1007.0851635666.

Adding to 1021406445 its reverse (5446041201), we get a palindrome (6467447646).

The spelling of 1021406445 in words is "one billion, twenty-one million, four hundred six thousand, four hundred forty-five".