1421115023 has 4 divisors (see below), whose sum is σ = 1447928568. Its totient is φ = 1394301480.

The previous prime is 1421114971. The next prime is 1421115037. The reversal of 1421115023 is 3205111241.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3205111241 = 53 ⋅60473797.

It is a cyclic number.

It is not a de Polignac number, because 1421115023 - 2¹⁸ = 1420852879 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1421114986 and 1421115004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1421615023) 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, 13406693 + ... + 13406798.

It is an arithmetic number, because the mean of its divisors is an integer number (361982142).

Almost surely, 2^1421115023 is an apocalyptic number.

1421115023 is a deficient number, since it is larger than the sum of its proper divisors (26813545).

1421115023 is an equidigital number, since it uses as much as digits as its factorization.

1421115023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26813544.

The product of its (nonzero) digits is 240, while the sum is 20.

The square root of 1421115023 is about 37697.6792787036. The cubic root of 1421115023 is about 1124.2849838099.

Adding to 1421115023 its reverse (3205111241), we get a palindrome (4626226264).

The spelling of 1421115023 in words is "one billion, four hundred twenty-one million, one hundred fifteen thousand, twenty-three".