1429921 has 12 divisors (see below), whose sum is σ = 1604772. Its totient is φ = 1269504.

The previous prime is 1429913. The next prime is 1429927. The reversal of 1429921 is 1299241.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 698896 + 731025 = 836^2 + 855^2 .

It is not a de Polignac number, because 1429921 - 2³ = 1429913 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1429921.

It is not an unprimeable number, because it can be changed into a prime (1429927) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6021 + ... + 6253.

It is an arithmetic number, because the mean of its divisors is an integer number (133731).

2^1429921 is an apocalyptic number.

It is an amenable number.

1429921 is a deficient number, since it is larger than the sum of its proper divisors (174851).

1429921 is a wasteful number, since it uses less digits than its factorization.

1429921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 288 (or 269 counting only the distinct ones).

The product of its digits is 1296, while the sum is 28.

The square root of 1429921 is about 1195.7930422945. The cubic root of 1429921 is about 112.6602424279.

The spelling of 1429921 in words is "one million, four hundred twenty-nine thousand, nine hundred twenty-one".