1428981 has 8 divisors (see below), whose sum is σ = 1914240. Its totient is φ = 948192.

The previous prime is 1428979. The next prime is 1428991. The reversal of 1428981 is 1898241.

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

It is not a de Polignac number, because 1428981 - 2¹ = 1428979 is a prime.

It is a super-2 number, since 2×1428981² = 4083973396722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1428991) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 280 + ... + 1713.

It is an arithmetic number, because the mean of its divisors is an integer number (239280).

2^1428981 is an apocalyptic number.

It is an amenable number.

1428981 is a deficient number, since it is larger than the sum of its proper divisors (485259).

1428981 is a wasteful number, since it uses less digits than its factorization.

1428981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2235.

The product of its digits is 4608, while the sum is 33.

The square root of 1428981 is about 1195.3999330768. The cubic root of 1428981 is about 112.6355501915.

The spelling of 1428981 in words is "one million, four hundred twenty-eight thousand, nine hundred eighty-one".