101090 has 16 divisors (see below), whose sum is σ = 198720. Its totient is φ = 36720.

The previous prime is 101089. The next prime is 101107. The reversal of 101090 is 90101.

It is a Harshad number since it is a multiple of its sum of digits (11).

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 350 + ... + 569.

It is an arithmetic number, because the mean of its divisors is an integer number (12420).

2¹⁰¹⁰⁹⁰ is an apocalyptic number.

101090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

101090 is a deficient number, since it is larger than the sum of its proper divisors (97630).

101090 is a wasteful number, since it uses less digits than its factorization.

101090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 937.

The product of its (nonzero) digits is 9, while the sum is 11.

The square root of 101090 is about 317.9465363862. The cubic root of 101090 is about 46.5839236729.

Adding to 101090 its sum of digits (11), we get a palindrome (101101).

Adding to 101090 its reverse (90101), we get a palindrome (191191).

The spelling of 101090 in words is "one hundred one thousand, ninety".