1642290 has 32 divisors (see below), whose sum is σ = 4245696. Its totient is φ = 404160.

The previous prime is 1642283. The next prime is 1642297. The reversal of 1642290 is 922461.

It is an interprime number because it is at equal distance from previous prime (1642283) and next prime (1642297).

It is a nialpdrome in base 6.

It is a self number, because there is not a number n which added to its sum of digits gives 1642290.

It is not an unprimeable number, because it can be changed into a prime (1642297) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1716 + ... + 2495.

It is an arithmetic number, because the mean of its divisors is an integer number (132678).

2^1642290 is an apocalyptic number.

1642290 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1642290 is an abundant number, since it is smaller than the sum of its proper divisors (2603406).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1642290 is a wasteful number, since it uses less digits than its factorization.

1642290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4234.

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 1642290 is about 1281.5186303757. The cubic root of 1642290 is about 117.9822342305.

The spelling of 1642290 in words is "one million, six hundred forty-two thousand, two hundred ninety".