42251242949 has 4 divisors (see below), whose sum is σ = 44088253536. Its totient is φ = 40414232364.

The previous prime is 42251242937. The next prime is 42251242967. The reversal of 42251242949 is 94924215224.

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 42251242949 - 2⁴ = 42251242933 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42251292949) 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, 918505259 + ... + 918505304.

It is an arithmetic number, because the mean of its divisors is an integer number (11022063384).

Almost surely, 2^42251242949 is an apocalyptic number.

It is an amenable number.

42251242949 is a deficient number, since it is larger than the sum of its proper divisors (1837010587).

42251242949 is a wasteful number, since it uses less digits than its factorization.

42251242949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1837010586.

The product of its digits is 414720, while the sum is 44.

The spelling of 42251242949 in words is "forty-two billion, two hundred fifty-one million, two hundred forty-two thousand, nine hundred forty-nine".