1421124461 has 2 divisors, whose sum is σ = 1421124462. Its totient is φ = 1421124460.

The previous prime is 1421124389. The next prime is 1421124487. The reversal of 1421124461 is 1644211241.

It is an a-pointer prime, because the next prime (1421124487) can be obtained adding 1421124461 to its sum of digits (26).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1363455625 + 57668836 = 36925^2 + 7594^2 .

It is an emirp because it is prime and its reverse (1644211241) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1421124461 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1421124461.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1421123461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 710562230 + 710562231.

It is an arithmetic number, because the mean of its divisors is an integer number (710562231).

Almost surely, 2^1421124461 is an apocalyptic number.

It is an amenable number.

1421124461 is a deficient number, since it is larger than the sum of its proper divisors (1).

1421124461 is an equidigital number, since it uses as much as digits as its factorization.

1421124461 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1536, while the sum is 26.

The square root of 1421124461 is about 37697.8044586154. The cubic root of 1421124461 is about 1124.2874726955.

The spelling of 1421124461 in words is "one billion, four hundred twenty-one million, one hundred twenty-four thousand, four hundred sixty-one".