128137154 has 4 divisors (see below), whose sum is σ = 192205734. Its totient is φ = 64068576.

The previous prime is 128137151. The next prime is 128137157. The reversal of 128137154 is 451731821.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 451731821 = 19 ⋅23775359.

It is an interprime number because it is at equal distance from previous prime (128137151) and next prime (128137157).

It can be written as a sum of positive squares in only one way, i.e., 121506529 + 6630625 = 11023^2 + 2575^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 128137154.

It is not an unprimeable number, because it can be changed into a prime (128137151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32034287 + ... + 32034290.

Almost surely, 2^128137154 is an apocalyptic number.

128137154 is a deficient number, since it is larger than the sum of its proper divisors (64068580).

128137154 is an equidigital number, since it uses as much as digits as its factorization.

128137154 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64068579.

The product of its digits is 6720, while the sum is 32.

The square root of 128137154 is about 11319.7682838475. The cubic root of 128137154 is about 504.1483590496.

Adding to 128137154 its reverse (451731821), we get a palindrome (579868975).

The spelling of 128137154 in words is "one hundred twenty-eight million, one hundred thirty-seven thousand, one hundred fifty-four".