1430129721 has 16 divisors (see below), whose sum is σ = 1917115200. Its totient is φ = 948296448.

The previous prime is 1430129683. The next prime is 1430129741. The reversal of 1430129721 is 1279210341.

It is not a de Polignac number, because 1430129721 - 2⁹ = 1430129209 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1430129741) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 522685 + ... + 525413.

It is an arithmetic number, because the mean of its divisors is an integer number (119819700).

Almost surely, 2^1430129721 is an apocalyptic number.

It is an amenable number.

1430129721 is a deficient number, since it is larger than the sum of its proper divisors (486985479).

1430129721 is a wasteful number, since it uses less digits than its factorization.

1430129721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3608.

The product of its (nonzero) digits is 3024, while the sum is 30.

The square root of 1430129721 is about 37817.0559536302. The cubic root of 1430129721 is about 1126.6572371307.

The spelling of 1430129721 in words is "one billion, four hundred thirty million, one hundred twenty-nine thousand, seven hundred twenty-one".