74868421 has 2 divisors, whose sum is σ = 74868422. Its totient is φ = 74868420.

The previous prime is 74868403. The next prime is 74868439. The reversal of 74868421 is 12486847.

It is a balanced prime because it is at equal distance from previous prime (74868403) and next prime (74868439).

It can be written as a sum of positive squares in only one way, i.e., 70812225 + 4056196 = 8415^2 + 2014^2 .

It is an emirp because it is prime and its reverse (12486847) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 74868421 - 2⁵ = 74868389 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (74868481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37434210 + 37434211.

It is an arithmetic number, because the mean of its divisors is an integer number (37434211).

Almost surely, 2^74868421 is an apocalyptic number.

It is an amenable number.

74868421 is a deficient number, since it is larger than the sum of its proper divisors (1).

74868421 is an equidigital number, since it uses as much as digits as its factorization.

74868421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 86016, while the sum is 40.

The square root of 74868421 is about 8652.6539859167. The cubic root of 74868421 is about 421.4695704521.

It can be divided in two parts, 7486 and 8421, that multiplied together give a triangular number (63039606 = T₁₁₂₂₈).

The spelling of 74868421 in words is "seventy-four million, eight hundred sixty-eight thousand, four hundred twenty-one".