61267421 has 4 divisors (see below), whose sum is σ = 61363644. Its totient is φ = 61171200.

The previous prime is 61267369. The next prime is 61267463. The reversal of 61267421 is 12476216.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 59059225 + 2208196 = 7685^2 + 1486^2 .

It is a cyclic number.

It is not a de Polignac number, because 61267421 - 2¹⁴ = 61251037 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61267021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47150 + ... + 48431.

It is an arithmetic number, because the mean of its divisors is an integer number (15340911).

Almost surely, 2^61267421 is an apocalyptic number.

It is an amenable number.

61267421 is a deficient number, since it is larger than the sum of its proper divisors (96223).

61267421 is an equidigital number, since it uses as much as digits as its factorization.

61267421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96222.

The product of its digits is 4032, while the sum is 29.

The square root of 61267421 is about 7827.3508289842. The cubic root of 61267421 is about 394.2241267352.

The spelling of 61267421 in words is "sixty-one million, two hundred sixty-seven thousand, four hundred twenty-one".