1307670521 has 2 divisors, whose sum is σ = 1307670522. Its totient is φ = 1307670520.

The previous prime is 1307670499. The next prime is 1307670527. The reversal of 1307670521 is 1250767031.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1040707600 + 266962921 = 32260^2 + 16339^2 .

It is a cyclic number.

It is not a de Polignac number, because 1307670521 - 2¹⁴ = 1307654137 is a prime.

It is a super-2 number, since 2×1307670521² = 3420004382984822882, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1307670527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 653835260 + 653835261.

It is an arithmetic number, because the mean of its divisors is an integer number (653835261).

Almost surely, 2^1307670521 is an apocalyptic number.

It is an amenable number.

1307670521 is a deficient number, since it is larger than the sum of its proper divisors (1).

1307670521 is an equidigital number, since it uses as much as digits as its factorization.

1307670521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8820, while the sum is 32.

The square root of 1307670521 is about 36161.7272955814. The cubic root of 1307670521 is about 1093.5352268097.

The spelling of 1307670521 in words is "one billion, three hundred seven million, six hundred seventy thousand, five hundred twenty-one".