987139425 has 48 divisors (see below), whose sum is σ = 1744174080. Its totient is φ = 490890240.

The previous prime is 987139423. The next prime is 987139427. The reversal of 987139425 is 524931789.

It is an interprime number because it is at equal distance from previous prime (987139423) and next prime (987139427).

It is not a de Polignac number, because 987139425 - 2¹ = 987139423 is a prime.

It is not an unprimeable number, because it can be changed into a prime (987139423) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 135424 + ... + 142526.

It is an arithmetic number, because the mean of its divisors is an integer number (36336960).

Almost surely, 2^987139425 is an apocalyptic number.

It is an amenable number.

987139425 is a deficient number, since it is larger than the sum of its proper divisors (757034655).

987139425 is a wasteful number, since it uses less digits than its factorization.

987139425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7242 (or 7237 counting only the distinct ones).

The product of its digits is 544320, while the sum is 48.

The square root of 987139425 is about 31418.7750397752. The cubic root of 987139425 is about 995.6946320754.

The spelling of 987139425 in words is "nine hundred eighty-seven million, one hundred thirty-nine thousand, four hundred twenty-five".