1012420290 has 32 divisors (see below), whose sum is σ = 2776924800. Its totient is φ = 231410304.

The previous prime is 1012420271. The next prime is 1012420291. The reversal of 1012420290 is 920242101.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (1012420291) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2410315 + ... + 2410734.

It is an arithmetic number, because the mean of its divisors is an integer number (86778900).

Almost surely, 2^1012420290 is an apocalyptic number.

1012420290 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1012420290 is an abundant number, since it is smaller than the sum of its proper divisors (1764504510).

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

1012420290 is a wasteful number, since it uses less digits than its factorization.

1012420290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4821066.

The product of its (nonzero) digits is 288, while the sum is 21.

The square root of 1012420290 is about 31818.5526069304. The cubic root of 1012420290 is about 1004.1230735673.

Adding to 1012420290 its reverse (920242101), we get a palindrome (1932662391).

The spelling of 1012420290 in words is "one billion, twelve million, four hundred twenty thousand, two hundred ninety".