1699442 has 4 divisors (see below), whose sum is σ = 2549166. Its totient is φ = 849720.

The previous prime is 1699427. The next prime is 1699457. The reversal of 1699442 is 2449961.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2449961 = 31 ⋅79031.

It is an interprime number because it is at equal distance from previous prime (1699427) and next prime (1699457).

It can be written as a sum of positive squares in only one way, i.e., 1666681 + 32761 = 1291^2 + 181^2 .

It is a super-2 number, since 2×1699442² = 5776206222728, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 424859 + ... + 424862.

2^1699442 is an apocalyptic number.

1699442 is a deficient number, since it is larger than the sum of its proper divisors (849724).

1699442 is an equidigital number, since it uses as much as digits as its factorization.

1699442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 849723.

The product of its digits is 15552, while the sum is 35.

The square root of 1699442 is about 1303.6264802465. The cubic root of 1699442 is about 119.3352596535.

The spelling of 1699442 in words is "one million, six hundred ninety-nine thousand, four hundred forty-two".