105142090 has 16 divisors (see below), whose sum is σ = 189641088. Its totient is φ = 41971216.

The previous prime is 105142073. The next prime is 105142099. The reversal of 105142090 is 90241501.

It is a super-2 number, since 2×105142090² = 22109718179136200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (105142099) 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, 5422 + ... + 15481.

It is an arithmetic number, because the mean of its divisors is an integer number (11852568).

Almost surely, 2^105142090 is an apocalyptic number.

105142090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

105142090 is a deficient number, since it is larger than the sum of its proper divisors (84498998).

105142090 is a wasteful number, since it uses less digits than its factorization.

105142090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21413.

The product of its (nonzero) digits is 360, while the sum is 22.

The square root of 105142090 is about 10253.8817040182. The cubic root of 105142090 is about 471.9821075521.

Adding to 105142090 its reverse (90241501), we get a palindrome (195383591).

The spelling of 105142090 in words is "one hundred five million, one hundred forty-two thousand, ninety".