1904531 has 2 divisors, whose sum is σ = 1904532. Its totient is φ = 1904530.

The previous prime is 1904521. The next prime is 1904533. The reversal of 1904531 is 1354091.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1904531 - 2⁶ = 1904467 is a prime.

It is a super-2 number, since 2×1904531² = 7254476659922, which contains 22 as substring.

Together with 1904533, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 1904497 and 1904506.

It is not a weakly prime, because it can be changed into another prime (1904533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 952265 + 952266.

It is an arithmetic number, because the mean of its divisors is an integer number (952266).

2^1904531 is an apocalyptic number.

1904531 is a deficient number, since it is larger than the sum of its proper divisors (1).

1904531 is an equidigital number, since it uses as much as digits as its factorization.

1904531 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 540, while the sum is 23.

The square root of 1904531 is about 1380.0474629519. The cubic root of 1904531 is about 123.9546096442.

The spelling of 1904531 in words is "one million, nine hundred four thousand, five hundred thirty-one".