1201634431 has 8 divisors (see below), whose sum is σ = 1243067904. Its totient is φ = 1160367960.

The previous prime is 1201634417. The next prime is 1201634449. The reversal of 1201634431 is 1344361021.

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 1201634431 - 2²⁷ = 1067416703 is a prime.

It is a super-2 number, since 2×1201634431² = 2887850611529387522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1201634396 and 1201634405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1201634491) 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, 27025 + ... + 55978.

It is an arithmetic number, because the mean of its divisors is an integer number (155383488).

Almost surely, 2^1201634431 is an apocalyptic number.

1201634431 is a deficient number, since it is larger than the sum of its proper divisors (41433473).

1201634431 is an equidigital number, since it uses as much as digits as its factorization.

1201634431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83501.

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 1201634431 is about 34664.5991034081. The cubic root of 1201634431 is about 1063.1408064500.

Adding to 1201634431 its reverse (1344361021), we get a palindrome (2545995452).

The spelling of 1201634431 in words is "one billion, two hundred one million, six hundred thirty-four thousand, four hundred thirty-one".