611127421 has 2 divisors, whose sum is σ = 611127422. Its totient is φ = 611127420.

The previous prime is 611127403. The next prime is 611127431. The reversal of 611127421 is 124721116.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 460574521 + 150552900 = 21461^2 + 12270^2 .

It is a cyclic number.

It is not a de Polignac number, because 611127421 - 2⁹ = 611126909 is a prime.

It is a super-2 number, since 2×611127421² = 746953449396222482, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (611127431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 305563710 + 305563711.

It is an arithmetic number, because the mean of its divisors is an integer number (305563711).

Almost surely, 2^611127421 is an apocalyptic number.

It is an amenable number.

611127421 is a deficient number, since it is larger than the sum of its proper divisors (1).

611127421 is an equidigital number, since it uses as much as digits as its factorization.

611127421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 672, while the sum is 25.

The square root of 611127421 is about 24720.9915051966. The cubic root of 611127421 is about 848.6147776765.

Adding to 611127421 its reverse (124721116), we get a palindrome (735848537).

The spelling of 611127421 in words is "six hundred eleven million, one hundred twenty-seven thousand, four hundred twenty-one".