1402724721 has 8 divisors (see below), whose sum is σ = 1872833440. Its totient is φ = 933882912.

The previous prime is 1402724681. The next prime is 1402724731. The reversal of 1402724721 is 1274272041.

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

It is not a de Polignac number, because 1402724721 - 2⁷ = 1402724593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1402724731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 314140 + ... + 318573.

It is an arithmetic number, because the mean of its divisors is an integer number (234104180).

Almost surely, 2^1402724721 is an apocalyptic number.

It is an amenable number.

1402724721 is a deficient number, since it is larger than the sum of its proper divisors (470108719).

1402724721 is an equidigital number, since it uses as much as digits as its factorization.

1402724721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 633455.

The product of its (nonzero) digits is 6272, while the sum is 30.

The square root of 1402724721 is about 37452.9667850225. The cubic root of 1402724721 is about 1119.4142134968.

Adding to 1402724721 its reverse (1274272041), we get a palindrome (2676996762).

The spelling of 1402724721 in words is "one billion, four hundred two million, seven hundred twenty-four thousand, seven hundred twenty-one".