242387407 has 4 divisors (see below), whose sum is σ = 248938456. Its totient is φ = 235836360.

The previous prime is 242387381. The next prime is 242387429. The reversal of 242387407 is 704783242.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 704783242 = 2 ⋅352391621.

It is a cyclic number.

It is not a de Polignac number, because 242387407 - 2⁷ = 242387279 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (37), and also a Moran number because the ratio is a prime number: 6551011 = 242387407 / (2 + 4 + 2 + 3 + 8 + 7 + 4 + 0 + 7).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (242387447) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3275469 + ... + 3275542.

It is an arithmetic number, because the mean of its divisors is an integer number (62234614).

Almost surely, 2^242387407 is an apocalyptic number.

242387407 is a deficient number, since it is larger than the sum of its proper divisors (6551049).

242387407 is an equidigital number, since it uses as much as digits as its factorization.

242387407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6551048.

The product of its (nonzero) digits is 75264, while the sum is 37.

The square root of 242387407 is about 15568.7959393140. The cubic root of 242387407 is about 623.5003250783.

The spelling of 242387407 in words is "two hundred forty-two million, three hundred eighty-seven thousand, four hundred seven".