1210661942 has 16 divisors (see below), whose sum is σ = 2084333472. Its totient is φ = 516626880.

The previous prime is 1210661939. The next prime is 1210661957. The reversal of 1210661942 is 2491660121.

It is a super-2 number, since 2×1210661942² = 2931404675614422728, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1210661899 and 1210661908.

It is a congruent number.

It is an unprimeable number.

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, 182309 + ... + 188832.

It is an arithmetic number, because the mean of its divisors is an integer number (130270842).

Almost surely, 2^1210661942 is an apocalyptic number.

1210661942 is a deficient number, since it is larger than the sum of its proper divisors (873671530).

1210661942 is a wasteful number, since it uses less digits than its factorization.

1210661942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 371383.

The product of its (nonzero) digits is 5184, while the sum is 32.

The square root of 1210661942 is about 34794.5677081926. The cubic root of 1210661942 is about 1065.7965172870.

The spelling of 1210661942 in words is "one billion, two hundred ten million, six hundred sixty-one thousand, nine hundred forty-two".