19425247 has 2 divisors, whose sum is σ = 19425248. Its totient is φ = 19425246.

The previous prime is 19425221. The next prime is 19425283. The reversal of 19425247 is 74252491.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19425247 is a prime.

It is a super-2 number, since 2×19425247² = 754680442022018, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19425047) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9712623 + 9712624.

It is an arithmetic number, because the mean of its divisors is an integer number (9712624).

Almost surely, 2^19425247 is an apocalyptic number.

19425247 is a deficient number, since it is larger than the sum of its proper divisors (1).

19425247 is an equidigital number, since it uses as much as digits as its factorization.

19425247 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20160, while the sum is 34.

The square root of 19425247 is about 4407.4081953003. The cubic root of 19425247 is about 268.8162488923.

The spelling of 19425247 in words is "nineteen million, four hundred twenty-five thousand, two hundred forty-seven".