30257146 has 4 divisors (see below), whose sum is σ = 45385722. Its totient is φ = 15128572.

The previous prime is 30257141. The next prime is 30257173. The reversal of 30257146 is 64175203.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 64175203 = 751 ⋅85453.

It can be written as a sum of positive squares in only one way, i.e., 22667121 + 7590025 = 4761^2 + 2755^2 .

It is not an unprimeable number, because it can be changed into a prime (30257141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7564285 + ... + 7564288.

Almost surely, 2^30257146 is an apocalyptic number.

30257146 is a deficient number, since it is larger than the sum of its proper divisors (15128576).

30257146 is a wasteful number, since it uses less digits than its factorization.

30257146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15128575.

The product of its (nonzero) digits is 5040, while the sum is 28.

The square root of 30257146 is about 5500.6495980020. The cubic root of 30257146 is about 311.6085175942.

It can be divided in two parts, 30257 and 146, that added together give a palindrome (30403).

The spelling of 30257146 in words is "thirty million, two hundred fifty-seven thousand, one hundred forty-six".