1381254917 has 4 divisors (see below), whose sum is σ = 1578577056. Its totient is φ = 1183932780.

The previous prime is 1381254911. The next prime is 1381254967. The reversal of 1381254917 is 7194521831.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1381254917 - 2²⁴ = 1364477701 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1381254911) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 98661059 + ... + 98661072.

It is an arithmetic number, because the mean of its divisors is an integer number (394644264).

Almost surely, 2^1381254917 is an apocalyptic number.

It is an amenable number.

1381254917 is a deficient number, since it is larger than the sum of its proper divisors (197322139).

1381254917 is an equidigital number, since it uses as much as digits as its factorization.

1381254917 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 197322138.

The product of its digits is 60480, while the sum is 41.

The square root of 1381254917 is about 37165.2380188800. The cubic root of 1381254917 is about 1113.6736538247.

The spelling of 1381254917 in words is "one billion, three hundred eighty-one million, two hundred fifty-four thousand, nine hundred seventeen".