1981029 has 8 divisors (see below), whose sum is σ = 2653920. Its totient is φ = 1314416.

The previous prime is 1980991. The next prime is 1981037. The reversal of 1981029 is 9201891.

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

It is a cyclic number.

It is not a de Polignac number, because 1981029 - 2⁸ = 1980773 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1980987 and 1981005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1981099) 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, 774 + ... + 2135.

It is an arithmetic number, because the mean of its divisors is an integer number (331740).

2^1981029 is an apocalyptic number.

It is an amenable number.

1981029 is a deficient number, since it is larger than the sum of its proper divisors (672891).

1981029 is a wasteful number, since it uses less digits than its factorization.

1981029 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3139.

The product of its (nonzero) digits is 1296, while the sum is 30.

The square root of 1981029 is about 1407.4903196825. The cubic root of 1981029 is about 125.5924727053.

The spelling of 1981029 in words is "one million, nine hundred eighty-one thousand, twenty-nine".