1971039 has 16 divisors (see below), whose sum is σ = 3068928. Its totient is φ = 1101792.

The previous prime is 1971029. The next prime is 1971049. The reversal of 1971039 is 9301791.

It is an interprime number because it is at equal distance from previous prime (1971029) and next prime (1971049).

It is not a de Polignac number, because 1971039 - 2⁴ = 1971023 is a prime.

It is an Ulam number.

1971039 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 1970997 and 1971015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1971029) 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 15 ways as a sum of consecutive naturals, for example, 12 + ... + 1985.

It is an arithmetic number, because the mean of its divisors is an integer number (191808).

2^1971039 is an apocalyptic number.

1971039 is a deficient number, since it is larger than the sum of its proper divisors (1097889).

1971039 is a wasteful number, since it uses less digits than its factorization.

1971039 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2054.

The product of its (nonzero) digits is 1701, while the sum is 30.

The square root of 1971039 is about 1403.9369643969. The cubic root of 1971039 is about 125.3810028481.

The spelling of 1971039 in words is "one million, nine hundred seventy-one thousand, thirty-nine".