1421361901 has 2 divisors, whose sum is σ = 1421361902. Its totient is φ = 1421361900.

The previous prime is 1421361881. The next prime is 1421361941. The reversal of 1421361901 is 1091631241.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1288881801 + 132480100 = 35901^2 + 11510^2 .

It is a cyclic number.

It is not a de Polignac number, because 1421361901 - 2⁵ = 1421361869 is a prime.

It is a super-2 number, since 2×1421361901² = 4040539307228667602, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1421361901.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1421361941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 710680950 + 710680951.

It is an arithmetic number, because the mean of its divisors is an integer number (710680951).

Almost surely, 2^1421361901 is an apocalyptic number.

It is an amenable number.

1421361901 is a deficient number, since it is larger than the sum of its proper divisors (1).

1421361901 is an equidigital number, since it uses as much as digits as its factorization.

1421361901 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 28.

The square root of 1421361901 is about 37700.9535821045. The cubic root of 1421361901 is about 1124.3500841366.

The spelling of 1421361901 in words is "one billion, four hundred twenty-one million, three hundred sixty-one thousand, nine hundred one".