74121534 has 16 divisors (see below), whose sum is σ = 164714640. Its totient is φ = 24707160.

The previous prime is 74121533. The next prime is 74121539. The reversal of 74121534 is 43512147.

74121534 is a `hidden beast` number, since 7 + 4 + 121 + 534 = 666.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 74121498 and 74121507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74121533) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 686257 + ... + 686364.

It is an arithmetic number, because the mean of its divisors is an integer number (10294665).

Almost surely, 2^74121534 is an apocalyptic number.

74121534 is an abundant number, since it is smaller than the sum of its proper divisors (90593106).

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

74121534 is a wasteful number, since it uses less digits than its factorization.

74121534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1372632 (or 1372626 counting only the distinct ones).

The product of its digits is 3360, while the sum is 27.

The square root of 74121534 is about 8609.3863892847. The cubic root of 74121534 is about 420.0633577888.

The spelling of 74121534 in words is "seventy-four million, one hundred twenty-one thousand, five hundred thirty-four".