1201990 has 8 divisors (see below), whose sum is σ = 2163600. Its totient is φ = 480792.

The previous prime is 1201969. The next prime is 1201999. The reversal of 1201990 is 991021.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1201999) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 60090 + ... + 60109.

It is an arithmetic number, because the mean of its divisors is an integer number (270450).

2^1201990 is an apocalyptic number.

1201990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1201990 is a deficient number, since it is larger than the sum of its proper divisors (961610).

1201990 is a wasteful number, since it uses less digits than its factorization.

1201990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120206.

The product of its (nonzero) digits is 162, while the sum is 22.

The square root of 1201990 is about 1096.3530453280. The cubic root of 1201990 is about 106.3245658814.

The spelling of 1201990 in words is "one million, two hundred one thousand, nine hundred ninety".