13720501 has 2 divisors, whose sum is σ = 13720502. Its totient is φ = 13720500.

The previous prime is 13720493. The next prime is 13720517. The reversal of 13720501 is 10502731.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12567025 + 1153476 = 3545^2 + 1074^2 .

It is a cyclic number.

It is not a de Polignac number, because 13720501 - 2³ = 13720493 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13720591) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6860250 + 6860251.

It is an arithmetic number, because the mean of its divisors is an integer number (6860251).

Almost surely, 2^13720501 is an apocalyptic number.

It is an amenable number.

13720501 is a deficient number, since it is larger than the sum of its proper divisors (1).

13720501 is an equidigital number, since it uses as much as digits as its factorization.

13720501 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 210, while the sum is 19.

The square root of 13720501 is about 3704.1194635163. The cubic root of 13720501 is about 239.3995464379.

The spelling of 13720501 in words is "thirteen million, seven hundred twenty thousand, five hundred one".