1307537645 has 16 divisors (see below), whose sum is σ = 1650672000. Its totient is φ = 992835648.

The previous prime is 1307537641. The next prime is 1307537657. The reversal of 1307537645 is 5467357031.

It is a happy number.

It is not a de Polignac number, because 1307537645 - 2² = 1307537641 is a prime.

It is a super-3 number, since 3×1307537645³ (a number of 28 digits) contains 333 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1307537641) 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, 67865 + ... + 84974.

It is an arithmetic number, because the mean of its divisors is an integer number (103167000).

Almost surely, 2^1307537645 is an apocalyptic number.

It is an amenable number.

1307537645 is a deficient number, since it is larger than the sum of its proper divisors (343134355).

1307537645 is a wasteful number, since it uses less digits than its factorization.

1307537645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152932.

The product of its (nonzero) digits is 264600, while the sum is 41.

The square root of 1307537645 is about 36159.8900025982. The cubic root of 1307537645 is about 1093.4981865139.

The spelling of 1307537645 in words is "one billion, three hundred seven million, five hundred thirty-seven thousand, six hundred forty-five".