1870121 has 8 divisors (see below), whose sum is σ = 2052864. Its totient is φ = 1689520.

The previous prime is 1870117. The next prime is 1870129. The reversal of 1870121 is 1210781.

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

It is a cyclic number.

It is not a de Polignac number, because 1870121 - 2² = 1870117 is a prime.

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

It is a junction number, because it is equal to n+sod(n) for n = 1870093 and 1870102.

It is not an unprimeable number, because it can be changed into a prime (1870129) 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, 1736 + ... + 2598.

It is an arithmetic number, because the mean of its divisors is an integer number (256608).

2^1870121 is an apocalyptic number.

1870121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1870121 is a deficient number, since it is larger than the sum of its proper divisors (182743).

1870121 is a wasteful number, since it uses less digits than its factorization.

1870121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1071.

The product of its (nonzero) digits is 112, while the sum is 20.

The square root of 1870121 is about 1367.5236743837. The cubic root of 1870121 is about 123.2035539327.

It can be divided in two parts, 1870 and 121, that added together give a palindrome (1991).

The spelling of 1870121 in words is "one million, eight hundred seventy thousand, one hundred twenty-one".