1142240445 has 24 divisors (see below), whose sum is σ = 1984214232. Its totient is φ = 607862400.

The previous prime is 1142240419. The next prime is 1142240447. The reversal of 1142240445 is 5440422411.

It can be written as a sum of positive squares in 4 ways, for example, as 49871844 + 1092368601 = 7062^2 + 33051^2 .

It is not a de Polignac number, because 1142240445 - 2⁷ = 1142240317 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1142240447) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6786 + ... + 48275.

It is an arithmetic number, because the mean of its divisors is an integer number (82675593).

Almost surely, 2^1142240445 is an apocalyptic number.

1142240445 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1142240445 is a deficient number, since it is larger than the sum of its proper divisors (841973787).

1142240445 is a wasteful number, since it uses less digits than its factorization.

1142240445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55533 (or 55530 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 27.

The square root of 1142240445 is about 33797.0478740378. The cubic root of 1142240445 is about 1045.3278261476.

Adding to 1142240445 its reverse (5440422411), we get a palindrome (6582662856).

The spelling of 1142240445 in words is "one billion, one hundred forty-two million, two hundred forty thousand, four hundred forty-five".