1011555442 has 4 divisors (see below), whose sum is σ = 1517333166. Its totient is φ = 505777720.

The previous prime is 1011555439. The next prime is 1011555443. The reversal of 1011555442 is 2445551101.

1011555442 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2445551101 = 7 ⋅349364443.

It can be written as a sum of positive squares in only one way, i.e., 952895161 + 58660281 = 30869^2 + 7659^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1011555442.

It is not an unprimeable number, because it can be changed into a prime (1011555443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 252888859 + ... + 252888862.

Almost surely, 2^1011555442 is an apocalyptic number.

1011555442 is a deficient number, since it is larger than the sum of its proper divisors (505777724).

1011555442 is an equidigital number, since it uses as much as digits as its factorization.

1011555442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 505777723.

The product of its (nonzero) digits is 4000, while the sum is 28.

The square root of 1011555442 is about 31804.9593931513. The cubic root of 1011555442 is about 1003.8370720469.

The spelling of 1011555442 in words is "one billion, eleven million, five hundred fifty-five thousand, four hundred forty-two".