30105457 has 8 divisors (see below), whose sum is σ = 31035816. Its totient is φ = 29181312.

The previous prime is 30105437. The next prime is 30105463. The reversal of 30105457 is 75450103.

It can be written as a sum of positive squares in 4 ways, for example, as 12666481 + 17438976 = 3559^2 + 4176^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30105457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30105437) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9453 + ... + 12229.

It is an arithmetic number, because the mean of its divisors is an integer number (3879477).

Almost surely, 2^30105457 is an apocalyptic number.

30105457 is a gapful number since it is divisible by the number (37) formed by its first and last digit.

It is an amenable number.

30105457 is a deficient number, since it is larger than the sum of its proper divisors (930359).

30105457 is a wasteful number, since it uses less digits than its factorization.

30105457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3107.

The product of its (nonzero) digits is 2100, while the sum is 25.

The square root of 30105457 is about 5486.8439926792. The cubic root of 30105457 is about 311.0869130509.

The spelling of 30105457 in words is "thirty million, one hundred five thousand, four hundred fifty-seven".