1951855 has 8 divisors (see below), whose sum is σ = 2480112. Its totient is φ = 1469568.

The previous prime is 1951843. The next prime is 1951867. The reversal of 1951855 is 5581591.

It is an interprime number because it is at equal distance from previous prime (1951843) and next prime (1951867).

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 1951855 - 2⁵ = 1951823 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1951855.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11397 + ... + 11566.

It is an arithmetic number, because the mean of its divisors is an integer number (310014).

2^1951855 is an apocalyptic number.

1951855 is a deficient number, since it is larger than the sum of its proper divisors (528257).

1951855 is a wasteful number, since it uses less digits than its factorization.

1951855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22985.

The product of its digits is 9000, while the sum is 34.

The square root of 1951855 is about 1397.0880430381. The cubic root of 1951855 is about 124.9729007922.

The spelling of 1951855 in words is "one million, nine hundred fifty-one thousand, eight hundred fifty-five".