30172542 has 8 divisors (see below), whose sum is σ = 60345096. Its totient is φ = 10057512.

The previous prime is 30172537. The next prime is 30172547. The reversal of 30172542 is 24527103.

It is an interprime number because it is at equal distance from previous prime (30172537) and next prime (30172547).

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

30172542 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30172547) 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, 2514373 + ... + 2514384.

It is an arithmetic number, because the mean of its divisors is an integer number (7543137).

Almost surely, 2^30172542 is an apocalyptic number.

30172542 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

30172542 is a wasteful number, since it uses less digits than its factorization.

30172542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5028762.

The product of its (nonzero) digits is 1680, while the sum is 24.

The square root of 30172542 is about 5492.9538501611. The cubic root of 30172542 is about 311.3178100994.

Adding to 30172542 its reverse (24527103), we get a palindrome (54699645).

The spelling of 30172542 in words is "thirty million, one hundred seventy-two thousand, five hundred forty-two".