1142002621 has 4 divisors (see below), whose sum is σ = 1142247744. Its totient is φ = 1141757500.

The previous prime is 1142002597. The next prime is 1142002627. The reversal of 1142002621 is 1262002411.

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: 1262002411 = 853 ⋅1479487.

It is a cyclic number.

It is not a de Polignac number, because 1142002621 - 2⁷ = 1142002493 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1142002627) 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, 115435 + ... + 124936.

It is an arithmetic number, because the mean of its divisors is an integer number (285561936).

Almost surely, 2^1142002621 is an apocalyptic number.

It is an amenable number.

1142002621 is a deficient number, since it is larger than the sum of its proper divisors (245123).

1142002621 is an equidigital number, since it uses as much as digits as its factorization.

1142002621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 245122.

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 1142002621 is about 33793.5292770672. The cubic root of 1142002621 is about 1045.2552724508.

The spelling of 1142002621 in words is "one billion, one hundred forty-two million, two thousand, six hundred twenty-one".