128136572 has 6 divisors (see below), whose sum is σ = 224239008. Its totient is φ = 64068284.

The previous prime is 128136571. The next prime is 128136577. The reversal of 128136572 is 275631821.

It is a happy number.

It is a super-2 number, since 2×128136572² = 32837962167822368, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128136571) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16017068 + ... + 16017075.

It is an arithmetic number, because the mean of its divisors is an integer number (37373168).

Almost surely, 2^128136572 is an apocalyptic number.

It is an amenable number.

128136572 is a deficient number, since it is larger than the sum of its proper divisors (96102436).

128136572 is a wasteful number, since it uses less digits than its factorization.

128136572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32034147 (or 32034145 counting only the distinct ones).

The product of its digits is 20160, while the sum is 35.

The square root of 128136572 is about 11319.7425765783. The cubic root of 128136572 is about 504.1475957664.

The spelling of 128136572 in words is "one hundred twenty-eight million, one hundred thirty-six thousand, five hundred seventy-two".