1378671525 has 288 divisors, whose sum is σ = 3387211776. Its totient is φ = 518400000.

The previous prime is 1378671523. The next prime is 1378671527. The reversal of 1378671525 is 5251768731.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1378671523) and next prime (1378671527).

It is not a de Polignac number, because 1378671525 - 2¹ = 1378671523 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

Its product of digits (352800) is a multiple of the sum of its prime divisors (225).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1378671523) by changing a digit.

It is a polite number, since it can be written in 287 ways as a sum of consecutive naturals, for example, 9130200 + ... + 9130350.

It is an arithmetic number, because the mean of its divisors is an integer number (11761152).

Almost surely, 2^1378671525 is an apocalyptic number.

1378671525 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1378671525 is an abundant number, since it is smaller than the sum of its proper divisors (2008540251).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1378671525 is a wasteful number, since it uses less digits than its factorization.

1378671525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 233 (or 225 counting only the distinct ones).

The product of its digits is 352800, while the sum is 45.

The square root of 1378671525 is about 37130.4662642418. The cubic root of 1378671525 is about 1112.9789109229.

The spelling of 1378671525 in words is "one billion, three hundred seventy-eight million, six hundred seventy-one thousand, five hundred twenty-five".