1304157 has 4 divisors (see below), whose sum is σ = 1738880. Its totient is φ = 869436.

The previous prime is 1304137. The next prime is 1304167. The reversal of 1304157 is 7514031.

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 1304157 - 2⁷ = 1304029 is a prime.

It is an Ulam number.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1304137) 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 in 3 ways as a sum of consecutive naturals, for example, 217357 + ... + 217362.

It is an arithmetic number, because the mean of its divisors is an integer number (434720).

2^1304157 is an apocalyptic number.

It is an amenable number.

1304157 is a deficient number, since it is larger than the sum of its proper divisors (434723).

1304157 is an equidigital number, since it uses as much as digits as its factorization.

1304157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 434722.

The product of its (nonzero) digits is 420, while the sum is 21.

The square root of 1304157 is about 1141.9969351973. The cubic root of 1304157 is about 109.2554958163.

Adding to 1304157 its reverse (7514031), we get a palindrome (8818188).

The spelling of 1304157 in words is "one million, three hundred four thousand, one hundred fifty-seven".