1298537 has 2 divisors, whose sum is σ = 1298538. Its totient is φ = 1298536.

The previous prime is 1298491. The next prime is 1298551. The reversal of 1298537 is 7358921.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1008016 + 290521 = 1004^2 + 539^2 .

It is a cyclic number.

It is not a de Polignac number, because 1298537 - 2¹⁴ = 1282153 is a prime.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 1298497 and 1298506.

It is not a weakly prime, because it can be changed into another prime (1297537) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 649268 + 649269.

It is an arithmetic number, because the mean of its divisors is an integer number (649269).

2^1298537 is an apocalyptic number.

It is an amenable number.

1298537 is a deficient number, since it is larger than the sum of its proper divisors (1).

1298537 is an equidigital number, since it uses as much as digits as its factorization.

1298537 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15120, while the sum is 35.

The square root of 1298537 is about 1139.5336765537. The cubic root of 1298537 is about 109.0983317130.

The spelling of 1298537 in words is "one million, two hundred ninety-eight thousand, five hundred thirty-seven".