1020112154 has 4 divisors (see below), whose sum is σ = 1530168234. Its totient is φ = 510056076.

The previous prime is 1020112153. The next prime is 1020112157. The reversal of 1020112154 is 4512110201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 4512110201 = 79 ⋅57115319.

It can be written as a sum of positive squares in only one way, i.e., 1003178929 + 16933225 = 31673^2 + 4115^2 .

It is not an unprimeable number, because it can be changed into a prime (1020112153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 255028037 + ... + 255028040.

Almost surely, 2^1020112154 is an apocalyptic number.

1020112154 is a deficient number, since it is larger than the sum of its proper divisors (510056080).

1020112154 is an equidigital number, since it uses as much as digits as its factorization.

1020112154 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 510056079.

The product of its (nonzero) digits is 80, while the sum is 17.

The square root of 1020112154 is about 31939.1946360581. The cubic root of 1020112154 is about 1006.6596025751.

Adding to 1020112154 its reverse (4512110201), we get a palindrome (5532222355).

The spelling of 1020112154 in words is "one billion, twenty million, one hundred twelve thousand, one hundred fifty-four".