1211967425 has 6 divisors (see below), whose sum is σ = 1502839638. Its totient is φ = 969573920.

The previous prime is 1211967401. The next prime is 1211967437. The reversal of 1211967425 is 5247691121.

It can be written as a sum of positive squares in 3 ways, for example, as 364924609 + 847042816 = 19103^2 + 29104^2 .

It is not a de Polignac number, because 1211967425 - 2¹⁰ = 1211966401 is a prime.

It is a super-2 number, since 2×1211967425² = 2937730078522261250, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 24239324 + ... + 24239373.

It is an arithmetic number, because the mean of its divisors is an integer number (250473273).

Almost surely, 2^1211967425 is an apocalyptic number.

It is an amenable number.

1211967425 is a deficient number, since it is larger than the sum of its proper divisors (290872213).

1211967425 is an equidigital number, since it uses as much as digits as its factorization.

1211967425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48478707 (or 48478702 counting only the distinct ones).

The product of its digits is 30240, while the sum is 38.

The square root of 1211967425 is about 34813.3225217014. The cubic root of 1211967425 is about 1066.1794701626.

The spelling of 1211967425 in words is "one billion, two hundred eleven million, nine hundred sixty-seven thousand, four hundred twenty-five".