1211254725 has 12 divisors (see below), whose sum is σ = 2002607936. Its totient is φ = 646002480.

The previous prime is 1211254717. The next prime is 1211254729. The reversal of 1211254725 is 5274521121.

It is a happy number.

It is not a de Polignac number, because 1211254725 - 2³ = 1211254717 is a prime.

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1211254692 and 1211254701.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211254729) 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, 8074957 + ... + 8075106.

Almost surely, 2^1211254725 is an apocalyptic number.

1211254725 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1211254725 is a deficient number, since it is larger than the sum of its proper divisors (791353211).

1211254725 is a wasteful number, since it uses less digits than its factorization.

1211254725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16150076 (or 16150071 counting only the distinct ones).

The product of its digits is 5600, while the sum is 30.

The square root of 1211254725 is about 34803.0849925693. The cubic root of 1211254725 is about 1065.9704394883.

Adding to 1211254725 its reverse (5274521121), we get a palindrome (6485775846).

The spelling of 1211254725 in words is "one billion, two hundred eleven million, two hundred fifty-four thousand, seven hundred twenty-five".