1201090 has 32 divisors (see below), whose sum is σ = 2410560. Its totient is φ = 427200.

The previous prime is 1201087. The next prime is 1201097. The reversal of 1201090 is 901021.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 1201090.

It is not an unprimeable number, because it can be changed into a prime (1201097) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6621 + ... + 6799.

It is an arithmetic number, because the mean of its divisors is an integer number (75330).

2^1201090 is an apocalyptic number.

1201090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1201090 is the 895-th pentagonal number.

1201090 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

1201090 is a wasteful number, since it uses less digits than its factorization.

1201090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 258.

The product of its (nonzero) digits is 18, while the sum is 13.

The square root of 1201090 is about 1095.9425167407. The cubic root of 1201090 is about 106.2980221213.

It can be divided in two parts, 12010 and 90, that added together give a square (12100 = 110²).

The spelling of 1201090 in words is "one million, two hundred one thousand, ninety".