1427261636 has 6 divisors (see below), whose sum is σ = 2497707870. Its totient is φ = 713630816.

The previous prime is 1427261597. The next prime is 1427261657. The reversal of 1427261636 is 6361627241.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1217591236 + 209670400 = 34894^2 + 14480^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1427261636.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 178407701 + ... + 178407708.

It is an arithmetic number, because the mean of its divisors is an integer number (416284645).

Almost surely, 2^1427261636 is an apocalyptic number.

It is an amenable number.

1427261636 is a deficient number, since it is larger than the sum of its proper divisors (1070446234).

1427261636 is a wasteful number, since it uses less digits than its factorization.

1427261636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 356815413 (or 356815411 counting only the distinct ones).

The product of its digits is 72576, while the sum is 38.

The square root of 1427261636 is about 37779.1164004665. The cubic root of 1427261636 is about 1125.9035732705.

Adding to 1427261636 its reverse (6361627241), we get a palindrome (7788888877).

The spelling of 1427261636 in words is "one billion, four hundred twenty-seven million, two hundred sixty-one thousand, six hundred thirty-six".