138451237 has 16 divisors (see below), whose sum is σ = 148488192. Its totient is φ = 128787120.

The previous prime is 138451199. The next prime is 138451267. The reversal of 138451237 is 732154831.

It is not a de Polignac number, because 138451237 - 2⁷ = 138451109 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138451267) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 227788 + ... + 228394.

It is an arithmetic number, because the mean of its divisors is an integer number (9280512).

Almost surely, 2^138451237 is an apocalyptic number.

It is an amenable number.

138451237 is a deficient number, since it is larger than the sum of its proper divisors (10036955).

138451237 is a wasteful number, since it uses less digits than its factorization.

138451237 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 888.

The product of its digits is 20160, while the sum is 34.

The square root of 138451237 is about 11766.5303722040. The cubic root of 138451237 is about 517.3275575027.

The spelling of 138451237 in words is "one hundred thirty-eight million, four hundred fifty-one thousand, two hundred thirty-seven".