1948861 has 2 divisors, whose sum is σ = 1948862. Its totient is φ = 1948860.

The previous prime is 1948847. The next prime is 1948867. The reversal of 1948861 is 1688491.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1943236 + 5625 = 1394^2 + 75^2 .

It is a cyclic number.

It is not a de Polignac number, because 1948861 - 2¹⁹ = 1424573 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1948861.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1948867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 974430 + 974431.

It is an arithmetic number, because the mean of its divisors is an integer number (974431).

2^1948861 is an apocalyptic number.

It is an amenable number.

1948861 is a deficient number, since it is larger than the sum of its proper divisors (1).

1948861 is an equidigital number, since it uses as much as digits as its factorization.

1948861 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13824, while the sum is 37.

The square root of 1948861 is about 1396.0161173855. The cubic root of 1948861 is about 124.9089683887.

It can be divided in two parts, 1948 and 861, that added together give a square (2809 = 53²).

The spelling of 1948861 in words is "one million, nine hundred forty-eight thousand, eight hundred sixty-one".