42297124781 has 4 divisors (see below), whose sum is σ = 42346365600. Its totient is φ = 42247883964.

The previous prime is 42297124763. The next prime is 42297124783. The reversal of 42297124781 is 18742179224.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 42297124781 - 2¹⁸ = 42296862637 is a prime.

It is a super-2 number, since 2×42297124781² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42297124783) 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, 24619121 + ... + 24620838.

It is an arithmetic number, because the mean of its divisors is an integer number (10586591400).

Almost surely, 2^42297124781 is an apocalyptic number.

It is an amenable number.

42297124781 is a deficient number, since it is larger than the sum of its proper divisors (49240819).

42297124781 is an equidigital number, since it uses as much as digits as its factorization.

42297124781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49240818.

The product of its digits is 451584, while the sum is 47.

The spelling of 42297124781 in words is "forty-two billion, two hundred ninety-seven million, one hundred twenty-four thousand, seven hundred eighty-one".