1381257485 has 8 divisors (see below), whose sum is σ = 1657722336. Its totient is φ = 1104863760.

The previous prime is 1381257473. The next prime is 1381257491. The reversal of 1381257485 is 5847521831.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1381257485 - 2⁴ = 1381257469 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45290 + ... + 69380.

It is an arithmetic number, because the mean of its divisors is an integer number (207215292).

Almost surely, 2^1381257485 is an apocalyptic number.

It is an amenable number.

1381257485 is a deficient number, since it is larger than the sum of its proper divisors (276464851).

1381257485 is a wasteful number, since it uses less digits than its factorization.

1381257485 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35563.

The product of its digits is 268800, while the sum is 44.

The square root of 1381257485 is about 37165.2725672771. The cubic root of 1381257485 is about 1113.6743439972.

The spelling of 1381257485 in words is "one billion, three hundred eighty-one million, two hundred fifty-seven thousand, four hundred eighty-five".