1142257797 has 12 divisors (see below), whose sum is σ = 1650665484. Its totient is φ = 761164800.

The previous prime is 1142257777. The next prime is 1142257799. The reversal of 1142257797 is 7977522411.

It can be written as a sum of positive squares in 2 ways, for example, as 605455236 + 536802561 = 24606^2 + 23169^2 .

It is not a de Polignac number, because 1142257797 - 2⁶ = 1142257733 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1142257799) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6204 + ... + 48197.

It is an arithmetic number, because the mean of its divisors is an integer number (137555457).

Almost surely, 2^1142257797 is an apocalyptic number.

It is an amenable number.

1142257797 is a deficient number, since it is larger than the sum of its proper divisors (508407687).

1142257797 is a wasteful number, since it uses less digits than its factorization.

1142257797 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56740 (or 56737 counting only the distinct ones).

The product of its digits is 246960, while the sum is 45.

The square root of 1142257797 is about 33797.3045818746. The cubic root of 1142257797 is about 1045.3331193812. Note that the first 3 decimals are identical.

The spelling of 1142257797 in words is "one billion, one hundred forty-two million, two hundred fifty-seven thousand, seven hundred ninety-seven".