1201690 has 16 divisors (see below), whose sum is σ = 2472192. Its totient is φ = 411984.

The previous prime is 1201687. The next prime is 1201691. The reversal of 1201690 is 961021.

It is a super-2 number, since 2×1201690² = 2888117712200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1201691) 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, 8514 + ... + 8653.

It is an arithmetic number, because the mean of its divisors is an integer number (154512).

2^1201690 is an apocalyptic number.

1201690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1201690 is an abundant number, since it is smaller than the sum of its proper divisors (1270502).

1201690 is a wasteful number, since it uses less digits than its factorization.

1201690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17181.

The product of its (nonzero) digits is 108, while the sum is 19.

The square root of 1201690 is about 1096.2162195480. The cubic root of 1201690 is about 106.3157194341.

It can be divided in two parts, 1201 and 690, that added together give a triangular number (1891 = T₆₁).

The spelling of 1201690 in words is "one million, two hundred one thousand, six hundred ninety".