1421386241 has 4 divisors (see below), whose sum is σ = 1550603184. Its totient is φ = 1292169300.

The previous prime is 1421386217. The next prime is 1421386247. The reversal of 1421386241 is 1426831241.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1426831241 = 11 ⋅129711931.

It is a cyclic number.

It is not a de Polignac number, because 1421386241 - 2¹⁸ = 1421124097 is a prime.

It is a super-2 number, since 2×1421386241² = 4040677692208220162, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1421386198 and 1421386207.

It is not an unprimeable number, because it can be changed into a prime (1421386247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 64608455 + ... + 64608476.

It is an arithmetic number, because the mean of its divisors is an integer number (387650796).

Almost surely, 2^1421386241 is an apocalyptic number.

1421386241 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1421386241 is a deficient number, since it is larger than the sum of its proper divisors (129216943).

1421386241 is a wasteful number, since it uses less digits than its factorization.

1421386241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129216942.

The product of its digits is 9216, while the sum is 32.

The square root of 1421386241 is about 37701.2763842287. The cubic root of 1421386241 is about 1124.3565020481.

The spelling of 1421386241 in words is "one billion, four hundred twenty-one million, three hundred eighty-six thousand, two hundred forty-one".