615120427 has 2 divisors, whose sum is σ = 615120428. Its totient is φ = 615120426.

The previous prime is 615120419. The next prime is 615120437. The reversal of 615120427 is 724021516.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 615120427 - 2³ = 615120419 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 615120395 and 615120404.

It is not a weakly prime, because it can be changed into another prime (615120437) 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 as a sum of consecutive naturals, namely, 307560213 + 307560214.

It is an arithmetic number, because the mean of its divisors is an integer number (307560214).

Almost surely, 2^615120427 is an apocalyptic number.

615120427 is a deficient number, since it is larger than the sum of its proper divisors (1).

615120427 is an equidigital number, since it uses as much as digits as its factorization.

615120427 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3360, while the sum is 28.

The square root of 615120427 is about 24801.6214590901. The cubic root of 615120427 is about 850.4590033029.

The spelling of 615120427 in words is "six hundred fifteen million, one hundred twenty thousand, four hundred twenty-seven".