122142906 has 36 divisors (see below), whose sum is σ = 279319482. Its totient is φ = 38569392.

The previous prime is 122142869. The next prime is 122142907. The reversal of 122142906 is 609241221.

It can be written as a sum of positive squares in only one way, i.e., 86322681 + 35820225 = 9291^2 + 5985^2 .

It is a super-2 number, since 2×122142906² = 29837778972249672, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 122142906.

It is not an unprimeable number, because it can be changed into a prime (122142907) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 2901 + ... + 15896.

Almost surely, 2^122142906 is an apocalyptic number.

122142906 is an abundant number, since it is smaller than the sum of its proper divisors (157176576).

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

122142906 is a wasteful number, since it uses less digits than its factorization.

122142906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18843 (or 18821 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 122142906 is about 11051.8281745601. The cubic root of 122142906 is about 496.1611431191.

The spelling of 122142906 in words is "one hundred twenty-two million, one hundred forty-two thousand, nine hundred six".