1245990 has 32 divisors (see below), whose sum is σ = 3066336. Its totient is φ = 323840.

The previous prime is 1245973. The next prime is 1246013. The reversal of 1245990 is 995421.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 724 + ... + 1736.

It is an arithmetic number, because the mean of its divisors is an integer number (95823).

2^1245990 is an apocalyptic number.

1245990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1245990, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1533168).

1245990 is an abundant number, since it is smaller than the sum of its proper divisors (1820346).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1245990 is a wasteful number, since it uses less digits than its factorization.

1245990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1064.

The product of its (nonzero) digits is 3240, while the sum is 30.

The square root of 1245990 is about 1116.2392216725. The cubic root of 1245990 is about 107.6064206632.

The spelling of 1245990 in words is "one million, two hundred forty-five thousand, nine hundred ninety".