1142780445 has 24 divisors (see below), whose sum is σ = 1981707000. Its totient is φ = 609209856.

The previous prime is 1142780423. The next prime is 1142780453. The reversal of 1142780445 is 5440872411.

It is a happy number.

1142780445 is a `hidden beast` number, since 1 + 142 + 78 + 0 + 445 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 15634116 + 1127146329 = 3954^2 + 33573^2 .

It is not a de Polignac number, because 1142780445 - 2⁸ = 1142780189 is a prime.

It is a super-3 number, since 3×1142780445³ (a number of 28 digits) contains 333 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 133041 + ... + 141369.

It is an arithmetic number, because the mean of its divisors is an integer number (82571125).

Almost surely, 2^1142780445 is an apocalyptic number.

1142780445 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1142780445 is a deficient number, since it is larger than the sum of its proper divisors (838926555).

1142780445 is a wasteful number, since it uses less digits than its factorization.

1142780445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11389 (or 11386 counting only the distinct ones).

The product of its (nonzero) digits is 35840, while the sum is 36.

The square root of 1142780445 is about 33805.0357935027. The cubic root of 1142780445 is about 1045.4925282173.

The spelling of 1142780445 in words is "one billion, one hundred forty-two million, seven hundred eighty thousand, four hundred forty-five".