1125202520 has 32 divisors (see below), whose sum is σ = 2726453520. Its totient is φ = 415459200.

The previous prime is 1125202499. The next prime is 1125202541. The reversal of 1125202520 is 252025211.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1125202499) and next prime (1125202541).

It is a super-2 number, since 2×1125202520² = 2532161422028700800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 1125202492 and 1125202501.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1081406 + ... + 1082445.

Almost surely, 2^1125202520 is an apocalyptic number.

1125202520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1125202520 is an abundant number, since it is smaller than the sum of its proper divisors (1601251000).

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

1125202520 is a wasteful number, since it uses less digits than its factorization.

1125202520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2163875 (or 2163871 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 20.

The square root of 1125202520 is about 33544.0385165531. The cubic root of 1125202520 is about 1040.1043164593.

Adding to 1125202520 its reverse (252025211), we get a palindrome (1377227731).

It can be divided in two parts, 1 and 125202520, that added together give a palindrome (125202521).

The spelling of 1125202520 in words is "one billion, one hundred twenty-five million, two hundred two thousand, five hundred twenty".