1420820741 has 4 divisors (see below), whose sum is σ = 1495600800. Its totient is φ = 1346040684.

The previous prime is 1420820717. The next prime is 1420820743. The reversal of 1420820741 is 1470280241.

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: 1470280241 = 17 ⋅86487073.

It is a cyclic number.

It is not a de Polignac number, because 1420820741 - 2⁶ = 1420820677 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1420820743) 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, 37390001 + ... + 37390038.

It is an arithmetic number, because the mean of its divisors is an integer number (373900200).

Almost surely, 2^1420820741 is an apocalyptic number.

It is an amenable number.

1420820741 is a deficient number, since it is larger than the sum of its proper divisors (74780059).

1420820741 is an equidigital number, since it uses as much as digits as its factorization.

1420820741 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74780058.

The product of its (nonzero) digits is 3584, while the sum is 29.

The square root of 1420820741 is about 37693.7758920488. The cubic root of 1420820741 is about 1124.2073734667.

The spelling of 1420820741 in words is "one billion, four hundred twenty million, eight hundred twenty thousand, seven hundred forty-one".