47121458 has 4 divisors (see below), whose sum is σ = 70682190. Its totient is φ = 23560728.

The previous prime is 47121413. The next prime is 47121469. The reversal of 47121458 is 85412174.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 85412174 = 2 ⋅42706087.

It can be written as a sum of positive squares in only one way, i.e., 29084449 + 18037009 = 5393^2 + 4247^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11780363 + ... + 11780366.

Almost surely, 2^47121458 is an apocalyptic number.

47121458 is a deficient number, since it is larger than the sum of its proper divisors (23560732).

47121458 is a wasteful number, since it uses less digits than its factorization.

47121458 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23560731.

The product of its digits is 8960, while the sum is 32.

The square root of 47121458 is about 6864.5071199613. The cubic root of 47121458 is about 361.1932064307.

The spelling of 47121458 in words is "forty-seven million, one hundred twenty-one thousand, four hundred fifty-eight".