57405069 has 6 divisors (see below), whose sum is σ = 82918446. Its totient is φ = 38270040.

The previous prime is 57405011. The next prime is 57405071. The reversal of 57405069 is 96050475.

It can be written as a sum of positive squares in only one way, i.e., 38378025 + 19027044 = 6195^2 + 4362^2 .

It is not a de Polignac number, because 57405069 - 2¹³ = 57396877 is a prime.

It is a super-2 number, since 2×57405069² = 6590683893789522, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57405869) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3189162 + ... + 3189179.

It is an arithmetic number, because the mean of its divisors is an integer number (13819741).

Almost surely, 2^57405069 is an apocalyptic number.

It is an amenable number.

57405069 is a deficient number, since it is larger than the sum of its proper divisors (25513377).

57405069 is a wasteful number, since it uses less digits than its factorization.

57405069 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6378347 (or 6378344 counting only the distinct ones).

The product of its (nonzero) digits is 37800, while the sum is 36.

The square root of 57405069 is about 7576.6132935501. The cubic root of 57405069 is about 385.7596044929.

It can be divided in two parts, 574050 and 69, that multiplied together give a triangular number (39609450 = T₈₉₀₀).

The spelling of 57405069 in words is "fifty-seven million, four hundred five thousand, sixty-nine".