1872401 has 4 divisors (see below), whose sum is σ = 1876404. Its totient is φ = 1868400.

The previous prime is 1872389. The next prime is 1872419. The reversal of 1872401 is 1042781.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 547600 + 1324801 = 740^2 + 1151^2 .

It is a cyclic number.

It is not a de Polignac number, because 1872401 - 2⁶ = 1872337 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1872421) 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, 1190 + ... + 2271.

It is an arithmetic number, because the mean of its divisors is an integer number (469101).

2^1872401 is an apocalyptic number.

It is an amenable number.

1872401 is a deficient number, since it is larger than the sum of its proper divisors (4003).

1872401 is an equidigital number, since it uses as much as digits as its factorization.

1872401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4002.

The product of its (nonzero) digits is 448, while the sum is 23.

The square root of 1872401 is about 1368.3570440495. The cubic root of 1872401 is about 123.2536023919.

The spelling of 1872401 in words is "one million, eight hundred seventy-two thousand, four hundred one".