42142499 has 6 divisors (see below), whose sum is σ = 49022964. Its totient is φ = 36122100.

The previous prime is 42142489. The next prime is 42142511. The reversal of 42142499 is 99424124.

It is a happy number.

It is not a de Polignac number, because 42142499 - 2¹² = 42138403 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42142459) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 429977 + ... + 430074.

It is an arithmetic number, because the mean of its divisors is an integer number (8170494).

Almost surely, 2^42142499 is an apocalyptic number.

42142499 is a gapful number since it is divisible by the number (49) formed by its first and last digit.

42142499 is a deficient number, since it is larger than the sum of its proper divisors (6880465).

42142499 is an equidigital number, since it uses as much as digits as its factorization.

42142499 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 860065 (or 860058 counting only the distinct ones).

The product of its digits is 20736, while the sum is 35.

The square root of 42142499 is about 6491.7254254936. The cubic root of 42142499 is about 347.9953400310.

The spelling of 42142499 in words is "forty-two million, one hundred forty-two thousand, four hundred ninety-nine".