137242887 has 8 divisors (see below), whose sum is σ = 193754736. Its totient is φ = 86113152.

The previous prime is 137242837. The next prime is 137242939. The reversal of 137242887 is 788242731.

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

It is not a de Polignac number, because 137242887 - 2⁷ = 137242759 is a prime.

It is a super-2 number, since 2×137242887² = 37671220064189538, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (137242837) 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 7 ways as a sum of consecutive naturals, for example, 1345468 + ... + 1345569.

It is an arithmetic number, because the mean of its divisors is an integer number (24219342).

Almost surely, 2^137242887 is an apocalyptic number.

137242887 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

137242887 is a deficient number, since it is larger than the sum of its proper divisors (56511849).

137242887 is a wasteful number, since it uses less digits than its factorization.

137242887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2691057.

The product of its digits is 150528, while the sum is 42.

The square root of 137242887 is about 11715.0709344843. The cubic root of 137242887 is about 515.8181447073.

The spelling of 137242887 in words is "one hundred thirty-seven million, two hundred forty-two thousand, eight hundred eighty-seven".