1220061402 has 48 divisors (see below), whose sum is σ = 3180116160. Its totient is φ = 330241536.

The previous prime is 1220061377. The next prime is 1220061433. The reversal of 1220061402 is 2041600221.

1220061402 is a `hidden beast` number, since 1 + 2 + 200 + 61 + 402 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 252423 + ... + 257210.

It is an arithmetic number, because the mean of its divisors is an integer number (66252420).

Almost surely, 2^1220061402 is an apocalyptic number.

1220061402 is an abundant number, since it is smaller than the sum of its proper divisors (1960054758).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1220061402 is a wasteful number, since it uses less digits than its factorization.

1220061402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 509667 (or 509664 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 1220061402 is about 34929.3773491598. The cubic root of 1220061402 is about 1068.5476560401.

Adding to 1220061402 its reverse (2041600221), we get a palindrome (3261661623).

The spelling of 1220061402 in words is "one billion, two hundred twenty million, sixty-one thousand, four hundred two".