1400869 has 4 divisors (see below), whose sum is σ = 1403244. Its totient is φ = 1398496.

The previous prime is 1400863. The next prime is 1400873. The reversal of 1400869 is 9680041.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 656100 + 744769 = 810^2 + 863^2 .

It is a cyclic number.

It is not a de Polignac number, because 1400869 - 2¹⁷ = 1269797 is a prime.

It is a super-2 number, since 2×1400869² = 3924867910322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1400863) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 459 + ... + 1735.

It is an arithmetic number, because the mean of its divisors is an integer number (350811).

2^1400869 is an apocalyptic number.

It is an amenable number.

1400869 is a deficient number, since it is larger than the sum of its proper divisors (2375).

1400869 is a wasteful number, since it uses less digits than its factorization.

1400869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2374.

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 1400869 is about 1183.5831191767. The cubic root of 1400869 is about 111.8920356277.

The spelling of 1400869 in words is "one million, four hundred thousand, eight hundred sixty-nine".