1142744621 has 4 divisors (see below), whose sum is σ = 1143796992. Its totient is φ = 1141692252.

The previous prime is 1142744611. The next prime is 1142744633. The reversal of 1142744621 is 1264472411.

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: 1264472411 = 7417 ⋅170483.

It is a cyclic number.

It is not a de Polignac number, because 1142744621 - 2⁶ = 1142744557 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1142744611) 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, 524555 + ... + 526728.

It is an arithmetic number, because the mean of its divisors is an integer number (285949248).

Almost surely, 2^1142744621 is an apocalyptic number.

It is an amenable number.

1142744621 is a deficient number, since it is larger than the sum of its proper divisors (1052371).

1142744621 is a wasteful number, since it uses less digits than its factorization.

1142744621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1052370.

The product of its digits is 10752, while the sum is 32.

The square root of 1142744621 is about 33804.5059274648. The cubic root of 1142744621 is about 1045.4816033671.

The spelling of 1142744621 in words is "one billion, one hundred forty-two million, seven hundred forty-four thousand, six hundred twenty-one".