140401537 has 4 divisors (see below), whose sum is σ = 141411760. Its totient is φ = 139391316.

The previous prime is 140401531. The next prime is 140401553. The reversal of 140401537 is 735104041.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 735104041 = 7 ⋅105014863.

It is a cyclic number.

It is not a de Polignac number, because 140401537 - 2³ = 140401529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (140401531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 504903 + ... + 505180.

It is an arithmetic number, because the mean of its divisors is an integer number (35352940).

Almost surely, 2^140401537 is an apocalyptic number.

It is an amenable number.

140401537 is a deficient number, since it is larger than the sum of its proper divisors (1010223).

140401537 is a wasteful number, since it uses less digits than its factorization.

140401537 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1010222.

The product of its (nonzero) digits is 1680, while the sum is 25.

The square root of 140401537 is about 11849.1154522184. The cubic root of 140401537 is about 519.7453597924.

Adding to 140401537 its reverse (735104041), we get a palindrome (875505578).

The spelling of 140401537 in words is "one hundred forty million, four hundred one thousand, five hundred thirty-seven".