1042123555 has 32 divisors (see below), whose sum is σ = 1425470400. Its totient is φ = 724416000.

The previous prime is 1042123553. The next prime is 1042123591. The reversal of 1042123555 is 5553212401.

It is not a de Polignac number, because 1042123555 - 2¹ = 1042123553 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1042123553) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 157861 + ... + 164329.

It is an arithmetic number, because the mean of its divisors is an integer number (44545950).

Almost surely, 2^1042123555 is an apocalyptic number.

1042123555 is a deficient number, since it is larger than the sum of its proper divisors (383346845).

1042123555 is a wasteful number, since it uses less digits than its factorization.

1042123555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6615.

The product of its (nonzero) digits is 6000, while the sum is 28.

The square root of 1042123555 is about 32281.9385260551. The cubic root of 1042123555 is about 1013.8485182461.

Adding to 1042123555 its reverse (5553212401), we get a palindrome (6595335956).

The spelling of 1042123555 in words is "one billion, forty-two million, one hundred twenty-three thousand, five hundred fifty-five".