30120157 has 4 divisors (see below), whose sum is σ = 30134560. Its totient is φ = 30105756.

The previous prime is 30120137. The next prime is 30120161. The reversal of 30120157 is 75102103.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 75102103 = 59 ⋅1272917.

It is a cyclic number.

It is not a de Polignac number, because 30120157 - 2¹⁵ = 30087389 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30120137) 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, 3393 + ... + 8470.

It is an arithmetic number, because the mean of its divisors is an integer number (7533640).

Almost surely, 2^30120157 is an apocalyptic number.

It is an amenable number.

30120157 is a deficient number, since it is larger than the sum of its proper divisors (14403).

30120157 is a wasteful number, since it uses less digits than its factorization.

30120157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14402.

The product of its (nonzero) digits is 210, while the sum is 19.

The square root of 30120157 is about 5488.1833970814. The cubic root of 30120157 is about 311.1375376881.

The spelling of 30120157 in words is "thirty million, one hundred twenty thousand, one hundred fifty-seven".