30142457 has 8 divisors (see below), whose sum is σ = 31033536. Its totient is φ = 29255472.

The previous prime is 30142439. The next prime is 30142477. The reversal of 30142457 is 75424103.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 30142457 - 2⁶ = 30142393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30142477) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20108 + ... + 21554.

It is an arithmetic number, because the mean of its divisors is an integer number (3879192).

Almost surely, 2^30142457 is an apocalyptic number.

30142457 is a gapful number since it is divisible by the number (37) formed by its first and last digit.

It is an amenable number.

30142457 is a deficient number, since it is larger than the sum of its proper divisors (891079).

30142457 is a wasteful number, since it uses less digits than its factorization.

30142457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2047.

The product of its (nonzero) digits is 3360, while the sum is 26.

The square root of 30142457 is about 5490.2146588271. The cubic root of 30142457 is about 311.2143041702.

The spelling of 30142457 in words is "thirty million, one hundred forty-two thousand, four hundred fifty-seven".