207742442 has 4 divisors (see below), whose sum is σ = 311613666. Its totient is φ = 103871220.

The previous prime is 207742421. The next prime is 207742453. The reversal of 207742442 is 244247702.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 244247702 = 2 ⋅122123851.

It can be written as a sum of positive squares in only one way, i.e., 141824281 + 65918161 = 11909^2 + 8119^2 .

It is a junction number, because it is equal to n+sod(n) for n = 207742399 and 207742408.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51935609 + ... + 51935612.

Almost surely, 2^207742442 is an apocalyptic number.

207742442 is a deficient number, since it is larger than the sum of its proper divisors (103871224).

207742442 is a wasteful number, since it uses less digits than its factorization.

207742442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103871223.

The product of its (nonzero) digits is 25088, while the sum is 32.

The square root of 207742442 is about 14413.2731188998. The cubic root of 207742442 is about 592.2545567212.

The spelling of 207742442 in words is "two hundred seven million, seven hundred forty-two thousand, four hundred forty-two".