81258902 has 8 divisors (see below), whose sum is σ = 121976712. Its totient is φ = 40600000.

The previous prime is 81258901. The next prime is 81258917. The reversal of 81258902 is 20985218.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81258901) 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, 11099 + ... + 16902.

It is an arithmetic number, because the mean of its divisors is an integer number (15247089).

Almost surely, 2^81258902 is an apocalyptic number.

81258902 is a deficient number, since it is larger than the sum of its proper divisors (40717810).

81258902 is a wasteful number, since it uses less digits than its factorization.

81258902 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29454.

The product of its (nonzero) digits is 11520, while the sum is 35.

The square root of 81258902 is about 9014.3719692500. The cubic root of 81258902 is about 433.1353700631.

The spelling of 81258902 in words is "eighty-one million, two hundred fifty-eight thousand, nine hundred two".