1420364749 has 4 divisors (see below), whose sum is σ = 1431207360. Its totient is φ = 1409522140.

The previous prime is 1420364731. The next prime is 1420364753. The reversal of 1420364749 is 9474630241.

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: 9474630241 = 42899 ⋅220859.

It is a cyclic number.

It is not a de Polignac number, because 1420364749 - 2²⁷ = 1286147021 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 (1420364719) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5421109 + ... + 5421370.

It is an arithmetic number, because the mean of its divisors is an integer number (357801840).

Almost surely, 2^1420364749 is an apocalyptic number.

It is an amenable number.

1420364749 is a deficient number, since it is larger than the sum of its proper divisors (10842611).

1420364749 is a wasteful number, since it uses less digits than its factorization.

1420364749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10842610.

The product of its (nonzero) digits is 145152, while the sum is 40.

The square root of 1420364749 is about 37687.7267688037. The cubic root of 1420364749 is about 1124.0870945312.

The spelling of 1420364749 in words is "one billion, four hundred twenty million, three hundred sixty-four thousand, seven hundred forty-nine".