30121974 has 24 divisors (see below), whose sum is σ = 65482560. Its totient is φ = 10007088.

The previous prime is 30121969. The next prime is 30121979. The reversal of 30121974 is 47912103.

It is an interprime number because it is at equal distance from previous prime (30121969) and next prime (30121979).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30121979) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3067 + ... + 8345.

It is an arithmetic number, because the mean of its divisors is an integer number (2728440).

Almost surely, 2^30121974 is an apocalyptic number.

30121974 is an abundant number, since it is smaller than the sum of its proper divisors (35360586).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

30121974 is a wasteful number, since it uses less digits than its factorization.

30121974 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5604 (or 5601 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 27.

The square root of 30121974 is about 5488.3489320560. The cubic root of 30121974 is about 311.1437940249.

The spelling of 30121974 in words is "thirty million, one hundred twenty-one thousand, nine hundred seventy-four".