425249987 has 2 divisors, whose sum is σ = 425249988. Its totient is φ = 425249986.

The previous prime is 425249983. The next prime is 425250011. The reversal of 425249987 is 789942524.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 425249987 - 2² = 425249983 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (425249983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 212624993 + 212624994.

It is an arithmetic number, because the mean of its divisors is an integer number (212624994).

Almost surely, 2^425249987 is an apocalyptic number.

425249987 is a deficient number, since it is larger than the sum of its proper divisors (1).

425249987 is an equidigital number, since it uses as much as digits as its factorization.

425249987 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1451520, while the sum is 50.

The square root of 425249987 is about 20621.5903120977. The cubic root of 425249987 is about 751.9946825818.

The spelling of 425249987 in words is "four hundred twenty-five million, two hundred forty-nine thousand, nine hundred eighty-seven".