7021429 has 4 divisors (see below), whose sum is σ = 7036000. Its totient is φ = 7006860.

The previous prime is 7021423. The next prime is 7021433. The reversal of 7021429 is 9241207.

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: 9241207 = 809 ⋅11423.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7021429 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7021423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6537 + ... + 7534.

It is an arithmetic number, because the mean of its divisors is an integer number (1759000).

Almost surely, 2^7021429 is an apocalyptic number.

It is an amenable number.

7021429 is a deficient number, since it is larger than the sum of its proper divisors (14571).

7021429 is a wasteful number, since it uses less digits than its factorization.

7021429 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14570.

The product of its (nonzero) digits is 1008, while the sum is 25.

The square root of 7021429 is about 2649.7979168231. The cubic root of 7021429 is about 191.4881203901.

The spelling of 7021429 in words is "seven million, twenty-one thousand, four hundred twenty-nine".