1915401 has 4 divisors (see below), whose sum is σ = 2553872. Its totient is φ = 1276932.

The previous prime is 1915399. The next prime is 1915411. The reversal of 1915401 is 1045191.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 1915401 - 2¹ = 1915399 is a prime.

It is a D-number.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1915411) 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, 319231 + ... + 319236.

It is an arithmetic number, because the mean of its divisors is an integer number (638468).

2^1915401 is an apocalyptic number.

It is an amenable number.

1915401 is a deficient number, since it is larger than the sum of its proper divisors (638471).

1915401 is an equidigital number, since it uses as much as digits as its factorization.

1915401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 638470.

The product of its (nonzero) digits is 180, while the sum is 21.

The square root of 1915401 is about 1383.9801299152. The cubic root of 1915401 is about 124.1899836597.

The spelling of 1915401 in words is "one million, nine hundred fifteen thousand, four hundred one".