425401551 has 40 divisors (see below), whose sum is σ = 664522320. Its totient is φ = 270853632.

The previous prime is 425401549. The next prime is 425401601. The reversal of 425401551 is 155104524.

It is not a de Polignac number, because 425401551 - 2¹ = 425401549 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (425401511) 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 39 ways as a sum of consecutive naturals, for example, 226920 + ... + 228786.

It is an arithmetic number, because the mean of its divisors is an integer number (16613058).

Almost surely, 2^425401551 is an apocalyptic number.

425401551 is a deficient number, since it is larger than the sum of its proper divisors (239120769).

425401551 is a wasteful number, since it uses less digits than its factorization.

425401551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2005 (or 1996 counting only the distinct ones).

The product of its (nonzero) digits is 4000, while the sum is 27.

The square root of 425401551 is about 20625.2648710265. The cubic root of 425401551 is about 752.0840118293.

The spelling of 425401551 in words is "four hundred twenty-five million, four hundred one thousand, five hundred fifty-one".