1304156137 has 4 divisors (see below), whose sum is σ = 1317068676. Its totient is φ = 1291243600.

The previous prime is 1304156123. The next prime is 1304156171. The reversal of 1304156137 is 7316514031.

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 977125081 + 327031056 = 31259^2 + 18084^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1304156137 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1304156099 and 1304156108.

It is not an unprimeable number, because it can be changed into a prime (1304156537) 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, 6456118 + ... + 6456319.

It is an arithmetic number, because the mean of its divisors is an integer number (329267169).

Almost surely, 2^1304156137 is an apocalyptic number.

It is an amenable number.

1304156137 is a deficient number, since it is larger than the sum of its proper divisors (12912539).

1304156137 is a wasteful number, since it uses less digits than its factorization.

1304156137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12912538.

The product of its (nonzero) digits is 7560, while the sum is 31.

The square root of 1304156137 is about 36113.1020129814. The cubic root of 1304156137 is about 1092.5547171704.

The spelling of 1304156137 in words is "one billion, three hundred four million, one hundred fifty-six thousand, one hundred thirty-seven".