1380452257 has 4 divisors (see below), whose sum is σ = 1406498580. Its totient is φ = 1354405936.

The previous prime is 1380452243. The next prime is 1380452279. The reversal of 1380452257 is 7522540831.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 438944401 + 941507856 = 20951^2 + 30684^2 .

It is a cyclic number.

It is not a de Polignac number, because 1380452257 - 2¹⁵ = 1380419489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1380452357) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 13023082 + ... + 13023187.

It is an arithmetic number, because the mean of its divisors is an integer number (351624645).

Almost surely, 2^1380452257 is an apocalyptic number.

It is an amenable number.

1380452257 is a deficient number, since it is larger than the sum of its proper divisors (26046323).

1380452257 is an equidigital number, since it uses as much as digits as its factorization.

1380452257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26046322.

The product of its (nonzero) digits is 67200, while the sum is 37.

The square root of 1380452257 is about 37154.4379179661. The cubic root of 1380452257 is about 1113.4578900070.

The spelling of 1380452257 in words is "one billion, three hundred eighty million, four hundred fifty-two thousand, two hundred fifty-seven".