81258652 has 6 divisors (see below), whose sum is σ = 142202648. Its totient is φ = 40629324.

The previous prime is 81258643. The next prime is 81258659. The reversal of 81258652 is 25685218.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81258659) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10157328 + ... + 10157335.

Almost surely, 2^81258652 is an apocalyptic number.

It is an amenable number.

81258652 is a deficient number, since it is larger than the sum of its proper divisors (60943996).

81258652 is a wasteful number, since it uses less digits than its factorization.

81258652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20314667 (or 20314665 counting only the distinct ones).

The product of its digits is 38400, while the sum is 37.

The square root of 81258652 is about 9014.3581024940. The cubic root of 81258652 is about 433.1349258699.

The spelling of 81258652 in words is "eighty-one million, two hundred fifty-eight thousand, six hundred fifty-two".