1201431 has 24 divisors (see below), whose sum is σ = 2035584. Its totient is φ = 623280.

The previous prime is 1201381. The next prime is 1201439. The reversal of 1201431 is 1341021.

It is a happy number.

It is not a de Polignac number, because 1201431 - 2¹³ = 1193239 is a prime.

It is a super-2 number, since 2×1201431² = 2886872895522, which contains 22 as substring.

1201431 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1201439) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1246 + ... + 1988.

It is an arithmetic number, because the mean of its divisors is an integer number (84816).

2^1201431 is an apocalyptic number.

1201431 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1201431 is a deficient number, since it is larger than the sum of its proper divisors (834153).

1201431 is a wasteful number, since it uses less digits than its factorization.

1201431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 771 (or 764 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 1201431 is about 1096.0980795531. The cubic root of 1201431 is about 106.3080808168.

Adding to 1201431 its reverse (1341021), we get a palindrome (2542452).

It can be divided in two parts, 120 and 1431, that added together give a palindrome (1551).

The spelling of 1201431 in words is "one million, two hundred one thousand, four hundred thirty-one".