30126381 has 16 divisors (see below), whose sum is σ = 42709440. Its totient is φ = 18835200.

The previous prime is 30126379. The next prime is 30126391. The reversal of 30126381 is 18362103.

It is not a de Polignac number, because 30126381 - 2¹ = 30126379 is a prime.

It is a super-2 number, since 2×30126381² = 1815197664314322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30126301) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3141 + ... + 8373.

It is an arithmetic number, because the mean of its divisors is an integer number (2669340).

Almost surely, 2^30126381 is an apocalyptic number.

It is an amenable number.

30126381 is a deficient number, since it is larger than the sum of its proper divisors (12583059).

30126381 is a wasteful number, since it uses less digits than its factorization.

30126381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5356.

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 30126381 is about 5488.7504042359. The cubic root of 30126381 is about 311.1589672650.

Adding to 30126381 its reverse (18362103), we get a palindrome (48488484).

The spelling of 30126381 in words is "thirty million, one hundred twenty-six thousand, three hundred eighty-one".