1142001421 has 4 divisors (see below), whose sum is σ = 1245819744. Its totient is φ = 1038183100.

The previous prime is 1142001397. The next prime is 1142001431. The reversal of 1142001421 is 1241002411.

It is a happy number.

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: 1241002411 = 11 ⋅112818401.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1142001421 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1142001395 and 1142001404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1142001431) 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, 51909145 + ... + 51909166.

It is an arithmetic number, because the mean of its divisors is an integer number (311454936).

Almost surely, 2^1142001421 is an apocalyptic number.

1142001421 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1142001421 is a deficient number, since it is larger than the sum of its proper divisors (103818323).

1142001421 is a wasteful number, since it uses less digits than its factorization.

1142001421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103818322.

The product of its (nonzero) digits is 64, while the sum is 16.

The square root of 1142001421 is about 33793.5115221843. The cubic root of 1142001421 is about 1045.2549063375.

Adding to 1142001421 its reverse (1241002411), we get a palindrome (2383003832).

The spelling of 1142001421 in words is "one billion, one hundred forty-two million, one thousand, four hundred twenty-one".