1210601261 has 8 divisors (see below), whose sum is σ = 1252816224. Its totient is φ = 1168886160.

The previous prime is 1210601239. The next prime is 1210601279. The reversal of 1210601261 is 1621060121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1210601261 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1210601221) 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 7 ways as a sum of consecutive naturals, for example, 120035 + ... + 129728.

It is an arithmetic number, because the mean of its divisors is an integer number (156602028).

Almost surely, 2^1210601261 is an apocalyptic number.

It is an amenable number.

1210601261 is a deficient number, since it is larger than the sum of its proper divisors (42214963).

1210601261 is a wasteful number, since it uses less digits than its factorization.

1210601261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 249931.

The product of its (nonzero) digits is 144, while the sum is 20.

The square root of 1210601261 is about 34793.6957076997. The cubic root of 1210601261 is about 1065.7787103125.

Adding to 1210601261 its reverse (1621060121), we get a palindrome (2831661382).

The spelling of 1210601261 in words is "one billion, two hundred ten million, six hundred one thousand, two hundred sixty-one".