1913825 has 12 divisors (see below), whose sum is σ = 2438460. Its totient is φ = 1488960.

The previous prime is 1913819. The next prime is 1913827. The reversal of 1913825 is 5283191.

It can be written as a sum of positive squares in 6 ways, for example, as 20449 + 1893376 = 143^2 + 1376^2 .

It is not a de Polignac number, because 1913825 - 2¹⁶ = 1848289 is a prime.

It is a super-2 number, since 2×1913825² = 7325452261250, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1913827) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 110 + ... + 1959.

It is an arithmetic number, because the mean of its divisors is an integer number (203205).

2^1913825 is an apocalyptic number.

It is an amenable number.

1913825 is a deficient number, since it is larger than the sum of its proper divisors (524635).

1913825 is a wasteful number, since it uses less digits than its factorization.

1913825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2116 (or 2111 counting only the distinct ones).

The product of its digits is 2160, while the sum is 29.

The square root of 1913825 is about 1383.4106404101. The cubic root of 1913825 is about 124.1559129665.

The spelling of 1913825 in words is "one million, nine hundred thirteen thousand, eight hundred twenty-five".