61374421 has 2 divisors, whose sum is σ = 61374422. Its totient is φ = 61374420.

The previous prime is 61374409. The next prime is 61374449. The reversal of 61374421 is 12447316.

It is an a-pointer prime, because the next prime (61374449) can be obtained adding 61374421 to its sum of digits (28).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 51696100 + 9678321 = 7190^2 + 3111^2 .

It is a cyclic number.

It is not a de Polignac number, because 61374421 - 2⁷ = 61374293 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 61374421.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61374461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30687210 + 30687211.

It is an arithmetic number, because the mean of its divisors is an integer number (30687211).

Almost surely, 2^61374421 is an apocalyptic number.

It is an amenable number.

61374421 is a deficient number, since it is larger than the sum of its proper divisors (1).

61374421 is an equidigital number, since it uses as much as digits as its factorization.

61374421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4032, while the sum is 28.

The square root of 61374421 is about 7834.1828546441. The cubic root of 61374421 is about 394.4534897938.

The spelling of 61374421 in words is "sixty-one million, three hundred seventy-four thousand, four hundred twenty-one".