1017900042 has 16 divisors (see below), whose sum is σ = 2083144800. Its totient is φ = 331409232.

The previous prime is 1017900019. The next prime is 1017900043. The reversal of 1017900042 is 2400097101.

It is a super-2 number, since 2×1017900042² = 2072240991007203528, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1017899985 and 1017900021.

It is not an unprimeable number, because it can be changed into a prime (1017900043) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1972417 + ... + 1972932.

It is an arithmetic number, because the mean of its divisors is an integer number (130196550).

Almost surely, 2^1017900042 is an apocalyptic number.

1017900042 is an abundant number, since it is smaller than the sum of its proper divisors (1065244758).

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

1017900042 is a wasteful number, since it uses less digits than its factorization.

1017900042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3945397.

The product of its (nonzero) digits is 504, while the sum is 24.

The square root of 1017900042 is about 31904.5457889624. The cubic root of 1017900042 is about 1005.9314292541.

Adding to 1017900042 its reverse (2400097101), we get a palindrome (3417997143).

The spelling of 1017900042 in words is "one billion, seventeen million, nine hundred thousand, forty-two".