1504991 has 2 divisors, whose sum is σ = 1504992. Its totient is φ = 1504990.

The previous prime is 1504981. The next prime is 1504999. The reversal of 1504991 is 1994051.

It is a strong prime.

It is an emirp because it is prime and its reverse (1994051) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1504991 - 2¹⁰ = 1503967 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1504999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 752495 + 752496.

It is an arithmetic number, because the mean of its divisors is an integer number (752496).

2^1504991 is an apocalyptic number.

1504991 is a deficient number, since it is larger than the sum of its proper divisors (1).

1504991 is an equidigital number, since it uses as much as digits as its factorization.

1504991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1620, while the sum is 29.

The square root of 1504991 is about 1226.7807465069. The cubic root of 1504991 is about 114.5982452292.

The spelling of 1504991 in words is "one million, five hundred four thousand, nine hundred ninety-one".