1228537 has 2 divisors, whose sum is σ = 1228538. Its totient is φ = 1228536.

The previous prime is 1228519. The next prime is 1228541. The reversal of 1228537 is 7358221.

It is the 453-rd star number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1207801 + 20736 = 1099^2 + 144^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1228537 is a prime.

It is not a weakly prime, because it can be changed into another prime (1228547) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 614268 + 614269.

It is an arithmetic number, because the mean of its divisors is an integer number (614269).

2^1228537 is an apocalyptic number.

It is an amenable number.

1228537 is a deficient number, since it is larger than the sum of its proper divisors (1).

1228537 is an equidigital number, since it uses as much as digits as its factorization.

1228537 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3360, while the sum is 28.

The square root of 1228537 is about 1108.3938830578. The cubic root of 1228537 is about 107.1016299373.

The spelling of 1228537 in words is "one million, two hundred twenty-eight thousand, five hundred thirty-seven".