142913749 has 4 divisors (see below), whose sum is σ = 155905920. Its totient is φ = 129921580.

The previous prime is 142913737. The next prime is 142913761. The reversal of 142913749 is 947319241.

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: 947319241 = 11 ⋅86119931.

It is an interprime number because it is at equal distance from previous prime (142913737) and next prime (142913761).

It is a cyclic number.

It is not a de Polignac number, because 142913749 - 2⁵ = 142913717 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142913149) 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 3 ways as a sum of consecutive naturals, for example, 6496069 + ... + 6496090.

It is an arithmetic number, because the mean of its divisors is an integer number (38976480).

Almost surely, 2^142913749 is an apocalyptic number.

It is an amenable number.

142913749 is a deficient number, since it is larger than the sum of its proper divisors (12992171).

142913749 is a wasteful number, since it uses less digits than its factorization.

142913749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12992170.

The product of its digits is 54432, while the sum is 40.

The square root of 142913749 is about 11954.6538636633. The cubic root of 142913749 is about 522.8269958509.

The spelling of 142913749 in words is "one hundred forty-two million, nine hundred thirteen thousand, seven hundred forty-nine".