19242545 has 12 divisors (see below), whose sum is σ = 26861364. Its totient is φ = 13194720.

The previous prime is 19242541. The next prime is 19242547. The reversal of 19242545 is 54524291.

It can be written as a sum of positive squares in 2 ways, for example, as 12054784 + 7187761 = 3472^2 + 2681^2 .

It is not a de Polignac number, because 19242545 - 2² = 19242541 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19242541) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 39026 + ... + 39515.

It is an arithmetic number, because the mean of its divisors is an integer number (2238447).

Almost surely, 2^19242545 is an apocalyptic number.

It is an amenable number.

19242545 is a deficient number, since it is larger than the sum of its proper divisors (7618819).

19242545 is an equidigital number, since it uses as much as digits as its factorization.

19242545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78560 (or 78553 counting only the distinct ones).

The product of its digits is 14400, while the sum is 32.

The square root of 19242545 is about 4386.6325353282. The cubic root of 19242545 is about 267.9708190178.

The spelling of 19242545 in words is "nineteen million, two hundred forty-two thousand, five hundred forty-five".