1051111242 has 80 divisors (see below), whose sum is σ = 2397507552. Its totient is φ = 344152800.

The previous prime is 1051111223. The next prime is 1051111249. The reversal of 1051111242 is 2421111501.

1051111242 is a `hidden beast` number, since 1 + 0 + 511 + 112 + 42 = 666.

It is a super-2 number, since 2×1051111242² = 2209669686117565128, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (1051111249) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 3714033 + ... + 3714315.

Almost surely, 2^1051111242 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1051111242, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1198753776).

1051111242 is an abundant number, since it is smaller than the sum of its proper divisors (1346396310).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1051111242 is a wasteful number, since it uses less digits than its factorization.

1051111242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 625 (or 616 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 18.

The square root of 1051111242 is about 32420.8457940258. The cubic root of 1051111242 is about 1016.7547898650.

Adding to 1051111242 its reverse (2421111501), we get a palindrome (3472222743).

The spelling of 1051111242 in words is "one billion, fifty-one million, one hundred eleven thousand, two hundred forty-two".