1620454 has 16 divisors (see below), whose sum is σ = 2690640. Its totient is φ = 725760.

The previous prime is 1620449. The next prime is 1620461. The reversal of 1620454 is 4540261.

1620454 is nontrivially palindromic in base 5.

It is a super-2 number, since 2×1620454² = 5251742332232, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1102 + ... + 2110.

It is an arithmetic number, because the mean of its divisors is an integer number (168165).

2^1620454 is an apocalyptic number.

1620454 is a deficient number, since it is larger than the sum of its proper divisors (1070186).

1620454 is a wasteful number, since it uses less digits than its factorization.

1620454 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1095.

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 1620454 is about 1272.9705416859. The cubic root of 1620454 is about 117.4569995061.

The spelling of 1620454 in words is "one million, six hundred twenty thousand, four hundred fifty-four".