1420457 has 8 divisors (see below), whose sum is σ = 1495680. Its totient is φ = 1346400.

The previous prime is 1420429. The next prime is 1420483. The reversal of 1420457 is 7540241.

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

It is a cyclic number.

It is not a de Polignac number, because 1420457 - 2⁸ = 1420201 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1420057) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3269 + ... + 3677.

It is an arithmetic number, because the mean of its divisors is an integer number (186960).

2^1420457 is an apocalyptic number.

It is an amenable number.

1420457 is a deficient number, since it is larger than the sum of its proper divisors (75223).

1420457 is a wasteful number, since it uses less digits than its factorization.

1420457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 583.

The product of its (nonzero) digits is 1120, while the sum is 23.

The square root of 1420457 is about 1191.8292662961. The cubic root of 1420457 is about 112.4111430044.

Adding to 1420457 its reverse (7540241), we get a palindrome (8960698).

It can be divided in two parts, 14204 and 57, that multiplied together give a triangular number (809628 = T₁₂₇₂).

The spelling of 1420457 in words is "one million, four hundred twenty thousand, four hundred fifty-seven".