128261534 has 8 divisors (see below), whose sum is σ = 192735720. Its totient is φ = 64016296.

The previous prime is 128261527. The next prime is 128261563. The reversal of 128261534 is 435162821.

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

It is a super-2 number, since 2×128261534² = 32902042208066312, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 128261534.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55829 + ... + 58080.

It is an arithmetic number, because the mean of its divisors is an integer number (24091965).

Almost surely, 2^128261534 is an apocalyptic number.

128261534 is a deficient number, since it is larger than the sum of its proper divisors (64474186).

128261534 is a wasteful number, since it uses less digits than its factorization.

128261534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114474.

The product of its digits is 11520, while the sum is 32.

The square root of 128261534 is about 11325.2608799974. The cubic root of 128261534 is about 504.3114283150.

The spelling of 128261534 in words is "one hundred twenty-eight million, two hundred sixty-one thousand, five hundred thirty-four".