1400091 has 48 divisors (see below), whose sum is σ = 2553600. Its totient is φ = 665280.

The previous prime is 1400081. The next prime is 1400093. The reversal of 1400091 is 1900041.

1400091 = 95² + 96² + ... + 171².

It is not a de Polignac number, because 1400091 - 2⁷ = 1399963 is a prime.

1400091 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 1400091.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1400093) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 48265 + ... + 48293.

It is an arithmetic number, because the mean of its divisors is an integer number (53200).

2^1400091 is an apocalyptic number.

1400091 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1400091 is a deficient number, since it is larger than the sum of its proper divisors (1153509).

1400091 is a wasteful number, since it uses less digits than its factorization.

1400091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80 (or 69 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 15.

The square root of 1400091 is about 1183.2544105136. The cubic root of 1400091 is about 111.8713179817.

The spelling of 1400091 in words is "one million, four hundred thousand, ninety-one".