1225531026 has 32 divisors (see below), whose sum is σ = 2728920000. Its totient is φ = 407682720.

The previous prime is 1225531009. The next prime is 1225531061. The reversal of 1225531026 is 6201355221.

It is a happy number.

1225531026 is a `hidden beast` number, since 1 + 2 + 2 + 553 + 102 + 6 = 666.

It is a super-2 number, since 2×1225531026² = 3003852591377225352, which contains 22 as substring.

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

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4206 + ... + 49686.

It is an arithmetic number, because the mean of its divisors is an integer number (85278750).

Almost surely, 2^1225531026 is an apocalyptic number.

1225531026 is an abundant number, since it is smaller than the sum of its proper divisors (1503388974).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1225531026 is a wasteful number, since it uses less digits than its factorization.

1225531026 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45991 (or 45985 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The square root of 1225531026 is about 35007.5852637682. The cubic root of 1225531026 is about 1070.1420680725.

Adding to 1225531026 its reverse (6201355221), we get a palindrome (7426886247).

The spelling of 1225531026 in words is "one billion, two hundred twenty-five million, five hundred thirty-one thousand, twenty-six".