128267451 has 30 divisors (see below), whose sum is σ = 201116500. Its totient is φ = 78775632.

The previous prime is 128267449. The next prime is 128267479. The reversal of 128267451 is 154762821.

It is not a de Polignac number, because 128267451 - 2¹ = 128267449 is a prime.

It is not an unprimeable number, because it can be changed into a prime (128267401) by changing a digit.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 256800 + ... + 257298.

Almost surely, 2^128267451 is an apocalyptic number.

128267451 is a deficient number, since it is larger than the sum of its proper divisors (72849049).

128267451 is an frugal number, since it uses more digits than its factorization.

128267451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 557 (or 515 counting only the distinct ones).

The product of its digits is 26880, while the sum is 36.

The square root of 128267451 is about 11325.5221071702. The cubic root of 128267451 is about 504.3191832116.

The spelling of 128267451 in words is "one hundred twenty-eight million, two hundred sixty-seven thousand, four hundred fifty-one".