1081212436 has 12 divisors (see below), whose sum is σ = 1901727828. Its totient is φ = 537861632.

The previous prime is 1081212421. The next prime is 1081212449. The reversal of 1081212436 is 6342121801.

It can be written as a sum of positive squares in 2 ways, for example, as 770395536 + 310816900 = 27756^2 + 17630^2 .

It is a super-2 number, since 2×1081212436² = 2338040663522108192, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 685261 + ... + 686836.

It is an arithmetic number, because the mean of its divisors is an integer number (158477319).

Almost surely, 2^1081212436 is an apocalyptic number.

It is an amenable number.

1081212436 is a deficient number, since it is larger than the sum of its proper divisors (820515392).

1081212436 is a wasteful number, since it uses less digits than its factorization.

1081212436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1372298 (or 1372296 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 1081212436 is about 32881.7949023468. The cubic root of 1081212436 is about 1026.3693570907.

The spelling of 1081212436 in words is "one billion, eighty-one million, two hundred twelve thousand, four hundred thirty-six".