77407425 has 54 divisors (see below), whose sum is σ = 146480022. Its totient is φ = 39070080.

The previous prime is 77407423. The next prime is 77407459. The reversal of 77407425 is 52470477.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 3326976 + 74080449 = 1824^2 + 8607^2 .

It is not a de Polignac number, because 77407425 - 2¹ = 77407423 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 77407425.

It is not an unprimeable number, because it can be changed into a prime (77407423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 53 ways as a sum of consecutive naturals, for example, 80749 + ... + 81701.

It is an arithmetic number, because the mean of its divisors is an integer number (2712593).

Almost surely, 2^77407425 is an apocalyptic number.

77407425 is a gapful number since it is divisible by the number (75) formed by its first and last digit.

It is an amenable number.

77407425 is a deficient number, since it is larger than the sum of its proper divisors (69072597).

77407425 is a wasteful number, since it uses less digits than its factorization.

77407425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1007 (or 980 counting only the distinct ones).

The product of its (nonzero) digits is 54880, while the sum is 36.

The square root of 77407425 is about 8798.1489530469. The cubic root of 77407425 is about 426.1811204966.

The spelling of 77407425 in words is "seventy-seven million, four hundred seven thousand, four hundred twenty-five".