1321436061 has 24 divisors (see below), whose sum is σ = 2204751744. Its totient is φ = 753759360.

The previous prime is 1321436023. The next prime is 1321436071. The reversal of 1321436061 is 1606341231.

1321436061 is a `hidden beast` number, since 13 + 2 + 1 + 43 + 606 + 1 = 666.

It is not a de Polignac number, because 1321436061 - 2¹¹ = 1321434013 is a prime.

It is a super-2 number, since 2×1321436061² = 3492386526622391442, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1321436071) 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, 390901 + ... + 394266.

It is an arithmetic number, because the mean of its divisors is an integer number (91864656).

Almost surely, 2^1321436061 is an apocalyptic number.

1321436061 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1321436061 is a deficient number, since it is larger than the sum of its proper divisors (883315683).

1321436061 is a wasteful number, since it uses less digits than its factorization.

1321436061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 785201 (or 785198 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 1321436061 is about 36351.5620159574. The cubic root of 1321436061 is about 1097.3589701913.

Adding to 1321436061 its reverse (1606341231), we get a palindrome (2927777292).

The spelling of 1321436061 in words is "one billion, three hundred twenty-one million, four hundred thirty-six thousand, sixty-one".