1420751 has 4 divisors (see below), whose sum is σ = 1444104. Its totient is φ = 1397400.

The previous prime is 1420729. The next prime is 1420753. The reversal of 1420751 is 1570241.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1420751 - 2¹⁴ = 1404367 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 (1420753) 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, 11585 + ... + 11706.

It is an arithmetic number, because the mean of its divisors is an integer number (361026).

2^1420751 is an apocalyptic number.

1420751 is a deficient number, since it is larger than the sum of its proper divisors (23353).

1420751 is an equidigital number, since it uses as much as digits as its factorization.

1420751 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23352.

The product of its (nonzero) digits is 280, while the sum is 20.

The square root of 1420751 is about 1191.9525997287. The cubic root of 1420751 is about 112.4188979256.

Adding to 1420751 its reverse (1570241), we get a palindrome (2990992).

The spelling of 1420751 in words is "one million, four hundred twenty thousand, seven hundred fifty-one".