137397145 has 8 divisors (see below), whose sum is σ = 174575304. Its totient is φ = 103451904.

The previous prime is 137397049. The next prime is 137397167. The reversal of 137397145 is 541793731.

It can be written as a sum of positive squares in 4 ways, for example, as 9684544 + 127712601 = 3112^2 + 11301^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-137397145 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 137397098 and 137397107.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 808134 + ... + 808303.

It is an arithmetic number, because the mean of its divisors is an integer number (21821913).

Almost surely, 2^137397145 is an apocalyptic number.

It is an amenable number.

137397145 is a deficient number, since it is larger than the sum of its proper divisors (37178159).

137397145 is a wasteful number, since it uses less digits than its factorization.

137397145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1616459.

The product of its digits is 79380, while the sum is 40.

The square root of 137397145 is about 11721.6528271400. The cubic root of 137397145 is about 516.0113284475.

The spelling of 137397145 in words is "one hundred thirty-seven million, three hundred ninety-seven thousand, one hundred forty-five".