1224739 has 2 divisors, whose sum is σ = 1224740. Its totient is φ = 1224738.

The previous prime is 1224709. The next prime is 1224763. The reversal of 1224739 is 9374221.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1224739 - 2¹³ = 1216547 is a prime.

It is not a weakly prime, because it can be changed into another prime (1224709) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 612369 + 612370.

It is an arithmetic number, because the mean of its divisors is an integer number (612370).

2^1224739 is an apocalyptic number.

1224739 is a deficient number, since it is larger than the sum of its proper divisors (1).

1224739 is an equidigital number, since it uses as much as digits as its factorization.

1224739 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3024, while the sum is 28.

The square root of 1224739 is about 1106.6792669965. The cubic root of 1224739 is about 106.9911484220.

The spelling of 1224739 in words is "one million, two hundred twenty-four thousand, seven hundred thirty-nine".