1407441721 has 4 divisors (see below), whose sum is σ = 1608504832. Its totient is φ = 1206378612.

The previous prime is 1407441677. The next prime is 1407441751. The reversal of 1407441721 is 1271447041.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1271447041 = 6547 ⋅194203.

It is a cyclic number.

It is not a de Polignac number, because 1407441721 - 2¹³ = 1407433529 is a prime.

It is a super-2 number, since 2×1407441721² = 3961784396022883682, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1407441751) 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 3 ways as a sum of consecutive naturals, for example, 100531545 + ... + 100531558.

It is an arithmetic number, because the mean of its divisors is an integer number (402126208).

Almost surely, 2^1407441721 is an apocalyptic number.

It is an amenable number.

1407441721 is a deficient number, since it is larger than the sum of its proper divisors (201063111).

1407441721 is an equidigital number, since it uses as much as digits as its factorization.

1407441721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 201063110.

The product of its (nonzero) digits is 6272, while the sum is 31.

The square root of 1407441721 is about 37515.8862483615. The cubic root of 1407441721 is about 1120.6675763422.

Adding to 1407441721 its reverse (1271447041), we get a palindrome (2678888762).

The spelling of 1407441721 in words is "one billion, four hundred seven million, four hundred forty-one thousand, seven hundred twenty-one".