71021492 has 12 divisors (see below), whose sum is σ = 124417860. Its totient is φ = 35473536.

The previous prime is 71021477. The next prime is 71021497. The reversal of 71021492 is 29412017.

It can be written as a sum of positive squares in 2 ways, for example, as 9461776 + 61559716 = 3076^2 + 7846^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71021497) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4763 + ... + 12834.

It is an arithmetic number, because the mean of its divisors is an integer number (10368155).

Almost surely, 2^71021492 is an apocalyptic number.

It is an amenable number.

71021492 is a deficient number, since it is larger than the sum of its proper divisors (53396368).

71021492 is a wasteful number, since it uses less digits than its factorization.

71021492 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18610 (or 18608 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 26.

The square root of 71021492 is about 8427.4249922500. The cubic root of 71021492 is about 414.1235521615.

The spelling of 71021492 in words is "seventy-one million, twenty-one thousand, four hundred ninety-two".