1420731 has 12 divisors (see below), whose sum is σ = 2210208. Its totient is φ = 874224.

The previous prime is 1420729. The next prime is 1420753. The reversal of 1420731 is 1370241.

It is not a de Polignac number, because 1420731 - 2¹ = 1420729 is a prime.

It is a super-2 number, since 2×1420731² = 4036953148722, which contains 22 as substring.

It is a hoax number, since the sum of its digits (18) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (1420721) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5955 + ... + 6188.

It is an arithmetic number, because the mean of its divisors is an integer number (184184).

2^1420731 is an apocalyptic number.

1420731 is a deficient number, since it is larger than the sum of its proper divisors (789477).

1420731 is a wasteful number, since it uses less digits than its factorization.

1420731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12162 (or 12159 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 18.

The square root of 1420731 is about 1191.9442101038. The cubic root of 1420731 is about 112.4183704138.

Adding to 1420731 its reverse (1370241), we get a palindrome (2790972).

The spelling of 1420731 in words is "one million, four hundred twenty thousand, seven hundred thirty-one".