1436036621 has 6 divisors (see below), whose sum is σ = 1449594510. Its totient is φ = 1422604376.

The previous prime is 1436036617. The next prime is 1436036659. The reversal of 1436036621 is 1266306341.

It can be written as a sum of positive squares in only one way, i.e., 1044194596 + 391842025 = 32314^2 + 19795^2 .

It is not a de Polignac number, because 1436036621 - 2² = 1436036617 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1436036681) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 51266 + ... + 74163.

It is an arithmetic number, because the mean of its divisors is an integer number (241599085).

Almost surely, 2^1436036621 is an apocalyptic number.

It is an amenable number.

1436036621 is a deficient number, since it is larger than the sum of its proper divisors (13557889).

1436036621 is an equidigital number, since it uses as much as digits as its factorization.

1436036621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125643 (or 125536 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 32.

The square root of 1436036621 is about 37895.0738355264. The cubic root of 1436036621 is about 1128.2062598045.

The spelling of 1436036621 in words is "one billion, four hundred thirty-six million, thirty-six thousand, six hundred twenty-one".