425239749 has 12 divisors (see below), whose sum is σ = 670074912. Its totient is φ = 257721000.

The previous prime is 425239747. The next prime is 425239783. The reversal of 425239749 is 947932524.

425239749 is a `hidden beast` number, since 4 + 252 + 397 + 4 + 9 = 666.

It is not a de Polignac number, because 425239749 - 2¹ = 425239747 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (425239747) 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 in 11 ways as a sum of consecutive naturals, for example, 2147577 + ... + 2147774.

It is an arithmetic number, because the mean of its divisors is an integer number (55839576).

Almost surely, 2^425239749 is an apocalyptic number.

It is an amenable number.

425239749 is a deficient number, since it is larger than the sum of its proper divisors (244835163).

425239749 is a wasteful number, since it uses less digits than its factorization.

425239749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4295368 (or 4295365 counting only the distinct ones).

The product of its digits is 544320, while the sum is 45.

The square root of 425239749 is about 20621.3420756264. The cubic root of 425239749 is about 751.9886477132.

The spelling of 425239749 in words is "four hundred twenty-five million, two hundred thirty-nine thousand, seven hundred forty-nine".