30125971 has 2 divisors, whose sum is σ = 30125972. Its totient is φ = 30125970.

The previous prime is 30125951. The next prime is 30125981. The reversal of 30125971 is 17952103.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 30125971 - 2¹³ = 30117779 is a prime.

It is not a weakly prime, because it can be changed into another prime (30125911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15062985 + 15062986.

It is an arithmetic number, because the mean of its divisors is an integer number (15062986).

Almost surely, 2^30125971 is an apocalyptic number.

30125971 is a deficient number, since it is larger than the sum of its proper divisors (1).

30125971 is an equidigital number, since it uses as much as digits as its factorization.

30125971 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1890, while the sum is 28.

The square root of 30125971 is about 5488.7130549884. The cubic root of 30125971 is about 311.1575557031.

The spelling of 30125971 in words is "thirty million, one hundred twenty-five thousand, nine hundred seventy-one".