1210402655 has 24 divisors (see below), whose sum is σ = 1843229520. Its totient is φ = 754535040.

The previous prime is 1210402651. The next prime is 1210402663. The reversal of 1210402655 is 5562040121.

It is not a de Polignac number, because 1210402655 - 2² = 1210402651 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1210402651) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 221870 + ... + 227259.

It is an arithmetic number, because the mean of its divisors is an integer number (76801230).

Almost surely, 2^1210402655 is an apocalyptic number.

1210402655 is a deficient number, since it is larger than the sum of its proper divisors (632826865).

1210402655 is a wasteful number, since it uses less digits than its factorization.

1210402655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 449159 (or 449152 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 26.

The square root of 1210402655 is about 34790.8415391177. The cubic root of 1210402655 is about 1065.7204247785.

Adding to 1210402655 its reverse (5562040121), we get a palindrome (6772442776).

The spelling of 1210402655 in words is "one billion, two hundred ten million, four hundred two thousand, six hundred fifty-five".