1425531531 has 8 divisors (see below), whose sum is σ = 1900982160. Its totient is φ = 950217632.

The previous prime is 1425531529. The next prime is 1425531533. The reversal of 1425531531 is 1351355241.

It is an interprime number because it is at equal distance from previous prime (1425531529) and next prime (1425531533).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1425531531 - 2¹ = 1425531529 is a prime.

It is a super-2 number, since 2×1425531531² = 4064280291750407922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1425531533) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6696 + ... + 53813.

It is an arithmetic number, because the mean of its divisors is an integer number (237622770).

Almost surely, 2^1425531531 is an apocalyptic number.

1425531531 is a deficient number, since it is larger than the sum of its proper divisors (475450629).

1425531531 is an equidigital number, since it uses as much as digits as its factorization.

1425531531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68365.

The product of its digits is 9000, while the sum is 30.

The square root of 1425531531 is about 37756.2118200436. The cubic root of 1425531531 is about 1125.4484548892.

Adding to 1425531531 its reverse (1351355241), we get a palindrome (2776886772).

The spelling of 1425531531 in words is "one billion, four hundred twenty-five million, five hundred thirty-one thousand, five hundred thirty-one".