1534921 has 2 divisors, whose sum is σ = 1534922. Its totient is φ = 1534920.

The previous prime is 1534901. The next prime is 1534931. The reversal of 1534921 is 1294351.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1527696 + 7225 = 1236^2 + 85^2 .

It is an emirp because it is prime and its reverse (1294351) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1534921 - 2⁵ = 1534889 is a prime.

It is not a weakly prime, because it can be changed into another prime (1534901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 767460 + 767461.

It is an arithmetic number, because the mean of its divisors is an integer number (767461).

2^1534921 is an apocalyptic number.

It is an amenable number.

1534921 is a deficient number, since it is larger than the sum of its proper divisors (1).

1534921 is an equidigital number, since it uses as much as digits as its factorization.

1534921 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1080, while the sum is 25.

The square root of 1534921 is about 1238.9192871208. The cubic root of 1534921 is about 115.3529421555.

The spelling of 1534921 in words is "one million, five hundred thirty-four thousand, nine hundred twenty-one".