1971534 has 8 divisors (see below), whose sum is σ = 3943080. Its totient is φ = 657176.

The previous prime is 1971527. The next prime is 1971539. The reversal of 1971534 is 4351791.

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

1971534 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1971539) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 164289 + ... + 164300.

It is an arithmetic number, because the mean of its divisors is an integer number (492885).

2^1971534 is an apocalyptic number.

1971534 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1971534 is a wasteful number, since it uses less digits than its factorization.

1971534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 328594.

The product of its digits is 3780, while the sum is 30.

The square root of 1971534 is about 1404.1132432963. The cubic root of 1971534 is about 125.3914978885.

The spelling of 1971534 in words is "one million, nine hundred seventy-one thousand, five hundred thirty-four".