1240553477 has 2 divisors, whose sum is σ = 1240553478. Its totient is φ = 1240553476.

The previous prime is 1240553471. The next prime is 1240553513. The reversal of 1240553477 is 7743550421.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 815616481 + 424936996 = 28559^2 + 20614^2 .

It is an emirp because it is prime and its reverse (7743550421) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1240553477 - 2³⁰ = 166811653 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1240553477.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1240553471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 620276738 + 620276739.

It is an arithmetic number, because the mean of its divisors is an integer number (620276739).

Almost surely, 2^1240553477 is an apocalyptic number.

It is an amenable number.

1240553477 is a deficient number, since it is larger than the sum of its proper divisors (1).

1240553477 is an equidigital number, since it uses as much as digits as its factorization.

1240553477 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 117600, while the sum is 38.

The square root of 1240553477 is about 35221.4916918634. The cubic root of 1240553477 is about 1074.4968915295.

The spelling of 1240553477 in words is "one billion, two hundred forty million, five hundred fifty-three thousand, four hundred seventy-seven".