1420235661 has 8 divisors (see below), whose sum is σ = 2039312800. Its totient is φ = 873991152.

The previous prime is 1420235653. The next prime is 1420235689. The reversal of 1420235661 is 1665320241.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1420235661 - 2³ = 1420235653 is a prime.

It is a super-2 number, since 2×1420235661² = 4034138665552213842, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1420235561) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18208111 + ... + 18208188.

It is an arithmetic number, because the mean of its divisors is an integer number (254914100).

Almost surely, 2^1420235661 is an apocalyptic number.

It is an amenable number.

1420235661 is a deficient number, since it is larger than the sum of its proper divisors (619077139).

1420235661 is a wasteful number, since it uses less digits than its factorization.

1420235661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36416315.

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 1420235661 is about 37686.0141299130. The cubic root of 1420235661 is about 1124.0530397690.

The spelling of 1420235661 in words is "one billion, four hundred twenty million, two hundred thirty-five thousand, six hundred sixty-one".