1225431 has 12 divisors (see below), whose sum is σ = 1808352. Its totient is φ = 799296.

The previous prime is 1225409. The next prime is 1225459. The reversal of 1225431 is 1345221.

1225431 is a `hidden beast` number, since 122 + 543 + 1 = 666.

It is not a de Polignac number, because 1225431 - 2⁷ = 1225303 is a prime.

It is a super-2 number, since 2×1225431² = 3003362271522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1225331) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1026 + ... + 1871.

It is an arithmetic number, because the mean of its divisors is an integer number (150696).

2^1225431 is an apocalyptic number.

1225431 is a deficient number, since it is larger than the sum of its proper divisors (582921).

1225431 is a wasteful number, since it uses less digits than its factorization.

1225431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2950 (or 2947 counting only the distinct ones).

The product of its digits is 240, while the sum is 18.

The square root of 1225431 is about 1106.9918698888. The cubic root of 1225431 is about 107.0112952818.

Adding to 1225431 its sum of digits (18), we get a square (1225449 = 1107²).

The spelling of 1225431 in words is "one million, two hundred twenty-five thousand, four hundred thirty-one".